Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e01d6ea83f91fa0…

MALICIOUS

PDF

87.3 KB Created: 2021-07-02 02:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 14f46beb6ec96f8fb3d46d6efab8ccca SHA-1: 261a4f6b8f5b4ea7245422b0b036f8a361bed088 SHA-256: 3e01d6ea83f91fa09a9bc0739aaa0bc3b8a2d6439071566bef3da12fd46b7ba5
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609544579157b---67710014835.pdf In PDF document text
    • http://beastyenergy.com/userfiles/file/rofizosebajatobuxipezezo.pdfIn PDF document text
    • http://fxmeat.com/upload/file/9b501eff433585cc4d556ef8c0db85bb.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b64f91e7f9---48494507180.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfc6f844d7---81732725123.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/24850141777.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16083bdc1949fc---7194267189.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///vejivupi.pdfIn PDF document text
    • http://dentherapia.hu/files/file/99119664677.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/04bce46d482e06edf517a768ba9a7772/zigagagokozatu.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bb5de2fcc---vivipusubifupekemide.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec01cdf9c4---23059274340.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/696e66cd958b14c634a9bcfe8d117ac6/89860762355.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bazakizikuzilixu.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/mixubefepodokukutug.pdfIn PDF document text
    • https://irantruck.ir/data/file/17047882923.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/4f91192fda010df78fe6c25dbd125400/62593059972.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6ee274e1a---11095941899.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072552cc3da3---bobavaxego.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/lewuliruratomalabesawasa.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/85059046458.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///38652185006.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/7d70d7ceaa0a15afc350bb78435cdcb2/bavawobemo.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/acael798054g9q3kb3fe7047l0/negoxorajusivinewif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=another+word+for+research+findingsPDF link annotation
    • 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_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 10776 bytes
SHA-256: 6476f26f4774d8fcc2867661661f8be1595af45a945496f14f240d4926c916df
font_01_sfnt_off000113a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB7 16824 bytes
SHA-256: 2c533195b9bdadacb948f36dd1e8dda8787c39c1251ea5493214cc1e74ca40b0

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