Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1910c489bdb9015…

MALICIOUS

PDF

95.7 KB Created: 2021-06-15 12:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 00c5c0d66828ed2e915db332dde20f92 SHA-1: ac6c0e2e59be41be357e812929e0341869dd11d3 SHA-256: b1910c489bdb9015a6dd5a4340f8dc155939113e3dbe09c9460017ddac95776a
154 Risk Score

Malware Insights

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

This PDF document contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure, likely directing users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8116

Heuristics 5

  • 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 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://philabc.ru/uplcv?utm_term=release+date+for+gabriel%2527s+inferno+part+3 PDF link annotation
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf77e38a81---nogomazezejizosagetaz.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/39f42c7dc41c17ee82dd6fcf2ba95023/xedomewu.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070abf2e6ad7---97153283048.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29c0a2f647---56111429456.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082e88e0dc7d---nikepujexisoxujezipuj.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cde5da4d8f---rufumegutonosidofojopaz.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09f284e849---12942270714.pdfIn PDF document text
    • http://garderoba.sk/images/_file/kujexizawajop.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/67d093dd0bf6786931ff1bfda812c032/ridujawuzibi.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/7que26h6vau3o3okiu1siqa8dv/34826130116.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/oht6kuipgqmt6cq15mqsbp5c70/99064559064.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4feb90dee2---38565484246.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/97112448703.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/7109f9062f15c24f88019e6bd0ddb222/14731021164.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/gv8sir7nsuk2ni366psbj6070f/temitesafewevewaxagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15237 5552 bytes
SHA-256: fccf08c9a9731a6b7879709d18094effd167fdb633fac7c53d166eb50bb5ad1a

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