Malicious PDF — malware analysis report

Static analysis result for SHA-256 735fbd5dd492ea57…

MALICIOUS

PDF

83.4 KB Created: 2021-06-29 03:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc7fdca42d48dc115dbf277026308bf7 SHA-1: 56ada5a22da494bfeddcca96c5d6a555c0947e09 SHA-256: 735fbd5dd492ea5787fc0c98529f2399cfe5bb191bce9742b6986399e97e4338
196 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host or redirect to further malicious content. The document body is heavily obfuscated, preventing detailed analysis of its specific payload, but the overall structure suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://fanaf.comarticle_ressources/file/wufuk.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d59f757ed6fafcf3befee0b4170e8ace/89507999834.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/tldomdrbh6tokfg7bi6qkcr7ep/bolopowinotabexikifeji.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809cc20d400---sumigumomutuwifenur.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608001fee9909---koxip.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa67fd76de---52908119801.pdf
    • https://travelone.ae/userfiles/files/33643313718.pdf
    • https://tradingphrases.com/userfiles/files/sofojebin.pdf
    • http://zonazero.es/userfiles/file/najirugiler.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/4ee162595ab8a34ab5af3e407ab9a6b8/refekan.pdf
    • http://absolutelyneon.com/userfiles/file/sowetiligasirutufugudalu.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f2832b93f---16273374586.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ea4092f7f---pasuxetafelareki.pdf
    • https://activepymes.com/pub/file/55195695891.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/c6d34feb6c213d67ff274c10c85cb71e/35132101082.pdf
    • http://renovator.cz/files/file/64225862069.pdf
    • https://isleo.com/i_photos/file/gosas.pdf
    • http://mevlanaasm.com/resimler/files/36741894659.pdf
    • http://bidmitt.com/img/files/file/raxobafulewilota.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/6426dff05b3b8d13c9d26f67ba9b254d/pesas.pdf
    • http://a-mega.ua/images/uploads/file/36162697796.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=regional+property+services
    • http://pro.ovh.net/~tribuene/images/banque/file/59973764615.pdf
    • 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_off0000df41.bin
da59018f609d05eba4537e51bcb1e521c6007993bd5e460393291c416aa45e90
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 10772 bytes
font_01_sfnt_off0000f844.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 16792 bytes
font_02_sfnt_off00011056.bin
e0cbd9f851da53e569eae50fbd37c9f8f40af9d0fa2f5eee8de654c6078584b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11056 18128 bytes