Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9211e0efb419c2…

MALICIOUS

PDF

62.3 KB Created: 2021-02-26 19:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a111f6afd20c06bd4b5a58153318b929 SHA-1: 26523919b20094658d9cbd3ec07be4b21ec47742 SHA-256: ab9211e0efb419c2dd1d1ce091923002268f7507dadf238fe32d32aaa580185c
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary suspicious URL pointing to a domain associated with phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7598

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/award?keyword=reset+toner+hl-l2360dw PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481847/normal_5fc9c3af3003c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_60326d82befd9.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/him6dhf/vavumo.pdfIn PDF document text
    • http://rewita.fun/332048960673yjmn.pdfIn PDF document text
    • http://vumagiwupesaka.22web.org/tuwuwulabefapigixox.pdfIn PDF document text
    • http://options.expert/5940645237t24zg.pdfIn PDF document text
    • http://findattime.com/apod._nasa._gov_archive_20183662d.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/can_you_determine_a1c_from_average_blood_sugar.pdfIn PDF document text
    • http://bezigex.iblogger.org/53634591278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_6011af5e993ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_60392c30d3e40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuvadofer.epizy.com/conduction_heat_transfer_nptel.pdfIn PDF document text
    • http://gedesopow.rf.gd/foxifimoliko.pdfIn 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_off0000d765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD765 5424 bytes
SHA-256: e6d7851bb5eac8db532d3b585b7f1aa30bfd7c6e1278ef83964efceba11732d2

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