Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b34191e62d3f0a…

MALICIOUS

PDF

89.0 KB Created: 2021-06-25 12:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0738065796549d59d717c9378a1df092 SHA-1: 242ba8e68983ab6c37d06a39e13607684f0d9b2e SHA-256: 22b34191e62d3f0ad5f97630e85aaff81664f241d8e3bd9b1ab2fcd9a251c3e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the nature of the URLs and the heuristic firings point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lapalettedesarts.fr/gestion/file/kuwolev.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/dd497463f4f76c03d9f3334dce24a4d7/93817915675.pdf
    • http://sahamit.net/userfiles/file/10268787293.pdf
    • http://placc.info/up_image/60060016718.pdf
    • http://anhuifan.com/upload_fck/file/2021-6-21/20210621150238762964.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/7f76b9549a218eb81313c7eb679f9890/xugunegawudefodazu.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/qj854skfjk7gcnbnhqe75kucn1/42623447797.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2b0f9d8f8---87668411250.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4b5481e6---67985754986.pdf
    • https://biorenta.lt/ckfinder/userfiles/files/48563760486.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/nolatofopilavazimabupipu.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/7a31f7c7ab708760d21aaf1725beebd1/97635349138.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada66d99f28---tunofid.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f880a5877---80276148412.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b6a571735aa5a57d9722017d3733b83e/zafezi.pdf
    • https://lescourailleurs.com/upload/editor/file/60454248837.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k2smaaph3qe49c57q7tr62p186/gejote.pdf
    • https://nadamasristorante.it/file/13799939320.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=10ticks+co+uk+answers
    • 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_off0000fad1.bin
79d79875dca1f2eab3db0c59541b75c08eb5b30d19028530d15bf9186e0f03c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 16892 bytes
font_01_sfnt_off000126e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126E9 16792 bytes
font_02_sfnt_off00013f00.bin
e5bc09bc9ebfa2686bddaef7cce4bf3ba4d8d9390d1f45451a569134af558453
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F00 10532 bytes