Malicious PDF — malware analysis report

Static analysis result for SHA-256 0699c65eecffba1e…

MALICIOUS

PDF

114.4 KB Created: 2021-07-22 05:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fbc78189d64e96847c0583b18ae81343 SHA-1: ec957321a12e2b72ce27484d80a27b6b1b3d0bb9 SHA-256: 0699c65eecffba1ed91d8dd57ce4be034220f29b18cdeadb6ddf808879c263da
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the structure and URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c6c087158---jonejomop.pdf In PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/49310182770.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/74925896303.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c665a457312---vijarubutibixup.pdfIn PDF document text
    • https://tomas-music.com/contents//files/27175611634.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f2f27dcb---sigokog.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a772bb4b8---tovinitererurusovozilu.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/68030662363.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/28013780277.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/405e409a9f9fd9fe29e8ff61019a3f9a/riniseriko.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825b42a2347---navanumukonugutisasit.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/muvodume.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/ziwaxeni.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/zosepimizuv.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bfac4c04a3b---99777926566.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9a0374fa4---baxulemus.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/78374289777.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc4094d0aed---zukanaxupogenuxutuwodeder.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd5ebae362---54302878649.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/f5f1e4be0605844c7022ae246049bcd3/42110084485.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/lipobofobozuziv.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ql9e9341rd7lp2mfiupmsvune5/dubeliv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=complement+in+telugu+meaningPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15827 18904 bytes
SHA-256: c001c4f09c4830d18c0ddf4e708dad2ffba45b4426a73a6f0f6b8f4d88fcbca9
font_01_sfnt_off0001896a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1896A 10460 bytes
SHA-256: 9b1cd9e2c379422271f3a28b1b27477aaff17d263da00a87a0cf5519011d5892
font_02_sfnt_off0001a11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A11D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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