Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b6fc222aff0183…

MALICIOUS

PDF

54.5 KB Created: 2021-04-21 06:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ed35e7d5ba0195e7df52ea9689945f SHA-1: ea1d79b1babe6e7ddd4871a3586f6db2ad8756d6 SHA-256: 46b6fc222aff0183b381d04e593fd1fafc58d1c63a4a0c688433b5a5a05a968a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The PDF contains numerous embedded URLs, many of which point to disposable domains and form a link farm, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an intent to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9812

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 http://spotlight-sites.com/sites/default/files/webform/razodogodipuvubetixem.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/dakorudi.pdf
    • https://aboss.by/sites/default/files/webform/89266631471.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/jilagofuzepev.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/fifomibap.pdf
    • https://www.uts.cw/sites/default/files/webform/89737617204.pdf
    • https://www.termis.org/system/files/webform/88699151804.pdf
    • http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/fipeforivu.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/238550972.pdf
    • https://ambrose.edu/sites/default/files/webform/gewematumupam.pdf
    • https://www.woonsocketri.org/system/temporary/webform/makepepatamizozixijefawop.pdf
    • https://www.uts.cw/sites/default/files/webform/bofuwidesuxugebogaxa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+old+was+ram+dass+when+he+died
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/10713621665.pdf
    • https://community.princeton.edu/system/files/webform/64301273598.pdf
    • https://campusrec.princeton.edu/system/files/webform/rilawadabovoxilezevateg.pdf
    • https://community.princeton.edu/system/files/webform/xakefabobadu.pdf

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