Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ba977887177187…

MALICIOUS

PDF

72.5 KB Created: 2021-06-21 10:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ae48547443747b328e3f3e1e5b3ae632 SHA-1: 294511f933ed273a3fd54d74a902152eb9b0b7e6 SHA-256: 44ba977887177187006448015d6f0585840d1a47fa20e53b43bfaa53aab3c797
154 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that likely lead to malicious content or phishing pages. The presence of compromised CMS upload links suggests a technique to host malicious files on seemingly legitimate but compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7310

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://garglob.ru/uplcv?utm_term=atividades+de+caligrafia+em+pdf PDF link annotation
    • http://abaj.cz/UserFiles/File/43007221432.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd26b7af7d---40297092219.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa3f92151---murepurunigojuka.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/49897917189.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5fbe6e02d09b63c920d44c8b2000a642/39724529925.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c346ef775---38814845777.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/bawogibogeted.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c56829c2bba---lapufoba.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/zeminugutapofovelesu.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/wegakefevavofafijiw.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072b41c8b071---33465120718.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/40005417777.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/45368157737.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/lc0kstg0jfdq9nscsjr6a841s4/litoxuvekite.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD712 5524 bytes
SHA-256: df9d7ac99f8720438dee49c45e267dae635c7b95eb7d7f785740b72c4d8a189d
font_01_sfnt_off0000e9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C8 13312 bytes
SHA-256: 5cdcfe817b79b2a2f46f3efa87ecfeb6a23c66af1980939251971c0be2968b16

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