Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc45a4f30bd43bd…

MALICIOUS

PDF

70.9 KB Created: 2021-05-06 18:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c51faed60fc36a264f3c84b4b544ae01 SHA-1: a345a4cdc5370a66aacef9fa99b4bc7f809a2c4b SHA-256: 9dc45a4f30bd43bd3311b595898b0ab100b291ec01ef311a55f9b7feee90f2d0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://garglob.ru/uplcv?utm_term=game+dreadout+2+pc
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ef4bce3ef---32231421423.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16070262497efb---dotagaginafavikiguwe.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b40dcd104---16151734103.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1773c075660e869cd6868d90fb632cfe/29308167694.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160778844394e8---62916799897.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/d2eeae61882706c2fbc5ff7df39019f9/likasotiwusowafuzamijus.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/fd2da4db78e9079483141478e6ad7587/1750689729.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/d4f312cca0880f4072f573519ef7e893/31435757013.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/sqr3fp9u3jvhfghfu99v7png0o/wesate.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/iii4qehpehi1bh31hfb1vnu1n4/lidusagozamukafi.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704242f3cb1---44140440478.pdf
    • https://communeouchamps.fr/userfiles/file/98623265346.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/34gpsocqm1hd2h1daj40nn9v0r/nawowul.pdf
    • http://mobydick-band.de/fckdata/file/lobep.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/41a03cb905466a471078e1867e059558/89025680077.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebb9f77c9d---fidunexosopojaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faac.bin
0c7db8e797a56530cfefbb48ef003d46c81532c797964d8000e1b3ddf75dfc76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 5172 bytes

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