Malicious PDF — malware analysis report

Static analysis result for SHA-256 142a9c34db20a77a…

MALICIOUS

PDF

24.2 KB Created: 2020-10-05 14:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 2f94c34321fed51c88a07f00c81e9556 SHA-1: 67fc3f0830e07b34dd5f2f5f4593f5d03bd217c1 SHA-256: 142a9c34db20a77af7bb81df789a82d4b9a6d2f3922575b0a15c9b36f5c53eed
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to disposable domains, many of which redirect to a known malicious infrastructure. The document's content appears to be a lure for torrent downloads, specifically mentioning 'king gizzard and the lizard wizard torrent'. The presence of multiple PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly indicates a malicious intent to redirect users to harmful sites. No scripts were extracted, but the document's structure and embedded links are sufficient to classify it as a malicious spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=king+gizzard+and+the+lizard+wizard+torrent In PDF document text
    • https://site-1039621.mozfiles.com/files/1039621/fisitonavoluzuvafilipam.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/39325345090.pdfIn PDF document text
    • https://site-1039573.mozfiles.com/files/1039573/37233847821.pdfIn PDF document text
    • http://mozodurav.statelineliteracycouncilbeloit.org/uploads/1/3/0/7/130740086/zobumamema-mozosu-siluxusefoluwov-redosopopob.pdfIn PDF document text
    • http://juwoko.mwmresearchgroup.org/uploads/1/3/1/4/131438405/9523730.pdfIn PDF document text
    • http://files.inspiredturquoisetack.com/uploads/1/3/0/7/130775189/xiviwonaxunosirobufa.pdfIn PDF document text
    • http://files.ibuysfv.com/uploads/1/3/1/3/131383751/wofusigarumoka_morarizotam_reripodawuba.pdfIn PDF document text
    • http://biwadedal.comepc.org/uploads/1/3/1/8/131856439/jojezoxu_gidem.pdfIn PDF document text
    • http://junifel.9488.kofcva.org/uploads/1/3/0/7/130776485/718fae8f27646.pdfIn PDF document text
    • http://files.friendsofreadsd.org/uploads/1/3/0/8/130814408/migumut-gagufanozar-vazom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abe49ca-7e2c-475e-abd7-7cd352a9f3f7/88404174625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a354fa9-b2f7-4939-becb-1c551feca23e/berakaxisibawuxa.pdfIn PDF document text

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