Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ade6ff6ac03d2a…

MALICIOUS

PDF

66.4 KB Created: 2021-06-24 22:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ba6fb8b1986d60627cb8fd51e155121c SHA-1: 82d2150ea01cb13a2eadeaf3304c0b6daab51eec SHA-256: 60ade6ff6ac03d2ac61327c6aa1ef507a61e1dff65130cee058063624fb57737
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, likely to distribute further malicious content or for SEO manipulation. The document body text is heavily obfuscated and appears to be a lure related to PDF conversion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://pozitron-s.ru/userfiles/file/noxogupex.pdf In PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/7728ba532d22ca92b1c647b37a638336/98915385108.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c7922feea13b14e5b552d68af75d7cc/15330389729.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86f06a6d2---xumigi.pdfIn PDF document text
    • http://lyshiying.com/d/files/97214394528.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/95520855534.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e68ed0edb98ef02c050edd991ec1ec1b/rexiteridap.pdfIn PDF document text
    • http://askort.pl/Upload/file/51610301521.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070067522775---38149377687.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/554ee51fc666271a8b79353d676e1b79/banapupinasikituvuri.pdfIn PDF document text
    • http://ekotronic.eu/files/file/21993544217.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/qv1of3cghldvls0uf7g5mq4cje/71051946313.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/56877090955.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/6242471454.pdfIn PDF document text
    • http://vhktn.at/images/content/files/pejavowikakamiligitu.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/jmo4tq49kc6ierli9d7l3kn3i4/begonejisakojo.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/sujenipajake.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16091510a5ae9a---bumeliwolovafufubon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+convert+a+scanned+pdf+to+word+for+editingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CD 5404 bytes
SHA-256: bd5f5d6e0f29368d1cea350f5cb01b2558dfa2990d8fbaf968284c82a49e6e3a
font_01_sfnt_off0000d857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD857 10496 bytes
SHA-256: 4ba460a2b32d15bd877b3d500b9aabc6b93155df6cac392d9811dcf239ca9f6c