Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c2a4f62fddc895…

MALICIOUS

PDF

94.7 KB Created: 2021-07-21 09:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 28a876f490b7fff3e69f19654a9cc302 SHA-1: 909e1a584f990544185024d0af8acf92f53f1deb SHA-256: 08c2a4f62fddc895cee2eae8d531b4e0937951cf2ea415939571f1b3c0988430
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing lure, including a fake download button and instructions suggesting a password-protected archive. The presence of numerous links to compromised WordPress sites and disposable hosting further supports a malicious intent. The ClamAV detection and ML classifier strongly indicate this file is malicious, likely serving as a dropper for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://murtenhof.ch/userfiles/files/jagagogufunad.pdf In PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/2d510a9854d1fb9fce5d12648341bbe7/33160544528.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/befuwunojozew.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6f31e30229199d967567e9048a32187f/75317092850.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/88d90c378124ca30af62e859f974beb4/41875694468.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a71f4cc3881---99671728001.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a5b480e1efb52d8352bf9b40e613b68c/90769853886.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles//files/61305500853.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/56974529483.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7d116b78f---7261530492.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a133904ac---gekeba.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/8424712950.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/009f4926f8c02c4f0acfa56922e060b4/nafewuwesupade.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/23510886868.pdfIn PDF document text
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/b2b535c4b3284d2dd345980e8e8e10fb/nigut.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/mibifik.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/d4288c920cbb2551796052948319fb9b/malipixinupozimotemafilo.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/b1635ef937f6f268fcd6df090ddf83bd/mojadadasup.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/muzudebisimirenol.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/0e8mhbnngnledp7q66jvu1bj6a/9022019160.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/s26fe7nl72d50srtuplsjlujs8/waxekofosovugejuresamemuw.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a8140619ef32d7a52f9fcfc71f065de6/42027237266.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/r727fdlpr207nlvvrph790go4j/wapejawelogelaxoseguparun.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/taxobipabomenipadudo.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a38926ff6---24919784956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=nba+2k20+download+for+free+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 16076 bytes
SHA-256: a788292cca142aeed5da50f6fe930e2a2735a94866157f12b187defed158ae4b
font_01_sfnt_off00010422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10422 22784 bytes
SHA-256: d136d02b00a312b484f8948791bc360959f8632bb610acf855b98c0d2202039f
font_02_sfnt_off00013c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001549c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1549C 10616 bytes
SHA-256: 33d417fa11eff3cdff7c8652584566994d3a18a75e7618f411b6ac0dd7357602

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