Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3c3ff12f5229fd…

MALICIOUS

PDF

68.3 KB Created: 2021-09-25 18:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 138d260024b661e993978d504842b142 SHA-1: f1e97626b53a88b102d37266531aa4a61d581f2c SHA-256: eb3c3ff12f5229fd841cf7e28648c2590d0e20869bf1f831616e395446972b1b
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting. The document body is unreadable, but the presence of many links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://shop-ecobati.com/medias/upload/files/fomojagumewixowa.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133c4904f3cc---80154229401.pdf
    • http://commandhousecreations.com/uploads/files/86284111189.pdf
    • http://hzzxtl.com/UploadFile/file/20210906101137279.pdf
    • http://studioboscono.it/userfiles/files/fafej.pdf
    • http://www.og2c.com/images/file/93837913689.pdf
    • http://ballmillfactory.com/d/files/lusijisi.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161484eff1c3e1---8370937269.pdf
    • http://aranysolyomfeszke.hu/editor_up/43149202860.pdf
    • http://probeg2000.ru/files/userfiles/files/89456890214.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161384ae465d6d---serexosugafelevovix.pdf
    • http://email-database.info/userfiles/file/95556744414.pdf
    • https://firsatoyun.com/calisma2/files/uploads/livurefawenujuvom.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613146c44433e---bofawolaxidatefu.pdf
    • https://renebeumer.nl/userfiles/file/lisikasuzemanelififitol.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135ca1295238---51078398486.pdf
    • http://wmasgroup.com/userfiles/file/92064321405.pdf
    • http://jca-t.com/fck_image/file/jasinuzamazoxedixure.pdf
    • http://gesht.ru/admin/ckfinder/userfiles/files/senikafiz.pdf
    • http://scvumaichiramen.com/uploads/files/86505875881.pdf
    • http://krossi.ru/images/content/files/76308864130.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=now+tv+app+for+chromebook
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac4e.bin
070d939972080818a3ccfdfc3b595f74774467749a03f0687a33d35a930a0296		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4E 10696 bytes
font_01_sfnt_off0000c4be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BE 16792 bytes
font_02_sfnt_off0000dcd0.bin
68669ec89e214683705960d34d803f536a6df12e3628eb007742d9326bc475b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 15724 bytes

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