Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a94431157debc76…

MALICIOUS

PDF

87.3 KB Created: 2021-06-26 14:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 628fd4c13aa258c1cbc91b47ceee3efb SHA-1: 50fd567e539f90c36ef05131bf8e0d5635a43b69 SHA-256: 0a94431157debc764a5dd2f331f489928a65081124699b8afe64b6a0d2cfe34a
216 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution attempt. The primary attack pattern involves luring users with promises of prizes or deliveries to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/b8e3c9452747b7a554161acf4d032e18/54880307756.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/auiq25kfh2mk9o7vo60kgask6j/33323805049.pdf
    • https://abandassociates.com/ckfinder/userfiles/files/waxesu.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31272efa17---35890082225.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7aaa986318---kizazukalijuredoxogi.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160acdf69b4e62---sabugimegepiramerokusu.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b4dfd7b57---71401928208.pdf
    • http://absolutelyneon.com/userfiles/file/vapex.pdf
    • http://skrabl.pl/www/rpbd/fck/file/16919308893.pdf
    • https://heuresromantiques.com/upload/files/lajejemomeminuxo.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c2705cbbfb79cecc9cd3941429bf5757/gowosedojuwox.pdf
    • http://cnex.cc/images/blog//file/gupefakef.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c58e57ece20---62208858357.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d522bae576---9672483412.pdf
    • https://atl-50.com/files/file/75221716680.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adc7bc67dbd---8589704194.pdf
    • https://ludifrance.fr/userfiles/file/56224836498.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39aeee91eb---59050355770.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/730d471570fd32044c788a2dfdfd812c/miwawis.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/971959a02bc8a1ff494069aaf97acc5e/47590082619.pdf
    • http://abwingssuffolk1.com/uploads/files/49431097895.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/4991118d72189302a314247b8b95f6f5/35545477870.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ed369b0c85af0a9e4ef21fd43080b6cd/gemasitu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=irs+certificate+of+residence
    • 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_off0000f14d.bin
ec6c31a87f9959888d26acfd2259d2a42ccb4955bb58ff74ac1059b3078fdeb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 10376 bytes
font_01_sfnt_off000108e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E5 16792 bytes
font_02_sfnt_off000120f7.bin
895245e68870107d645797b3e56038ac7380e3829e55b1daef6e8e20574dee99
pdf-font-stream PDF embedded font (sfnt) at offset 0x120F7 17960 bytes