Malicious PDF — malware analysis report

Static analysis result for SHA-256 f373dccaf9f0d9ec…

MALICIOUS

PDF

104.6 KB Created: 2021-09-01 18:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ab858e0f71855816c5083d2571765c8d SHA-1: ce9a5d0f01a55f0560b040a5ae42e5545678864a SHA-256: f373dccaf9f0d9ec533f53e4bb839526eb86053543a2d70997adeb7eb6b0703c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://philabc.ru/uplcv?utm_term=meere+numerologist+book+pdf+free+download PDF link annotation
    • http://www.awakohchang.com/image/upload/File/0083372006.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/pmbjpci68onb16i6cv1i6g13g0/kefamomiginaxe.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dcb316a88---migugijid.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/genamawuzitij.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/fl6i83biprf5qura022u4t0mo6/89367397159.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/vanin.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818da761faa---lojevuruzovegizedon.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/94181332817.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/97414142448.pdfIn PDF document text
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/pujekasapab.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/35041451627.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/r9ukgnpj7dbcgp20r59d366o4c/kepivumozamu.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/boxebebuwivutaxoje.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/samemiwudejesuzenese.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ab88dc27f2796d8d37c59b67ee8f7a2a/67622386867.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/05982357c33263325f3566367e165d80/78898352027.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/diwareviz.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27affa58d5---91397604041.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/161204cc2d355c---guzaso.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/mukesijivib.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607192be5f22d---62546988372.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/wameloxiruser.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5ncfgi3uerqgikk7r872t0bctn/33429741152.pdfIn PDF document text
    • https://sukaunited4d.vip/contents//files/52607790345.pdfIn PDF document text
    • 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_off000127b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCF 11252 bytes
SHA-256: 9ff52b66cb64fd5be14652c2c330d0037e972db6564aa41d1e660c11848f7ac4
font_02_sfnt_off000159d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D4 21604 bytes
SHA-256: 6818e2a16dfbec1d8b11344ea684b954622b25d00bc35398b51dc8ee480e8d96

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