Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccefd6c9a38aff6…

MALICIOUS

PDF

69.6 KB Created: 2021-03-15 20:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff72f37246eb2b33292e6587bfcbfb9 SHA-1: d6441ea608c52d0aedd1ff4fe904b2dc218433db SHA-256: cccefd6c9a38aff6832f477a93526a5a0367834b6579bba6b2a4eb7640b88d82
184 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm, likely intended to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7004

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/aws?utm_term=human+trafficking+based+on+a+true+story
    • https://gupuvuzuguzi.weebly.com/uploads/1/3/1/3/131379578/filirutobozifar_xirorageviweti_daferurosaz_neribevomat.pdf
    • http://microbestdigitalmeter.xyz/gapumoverutabozufedibisiply7l.pdf
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/5d7519a16.pdf
    • http://scriptbook.xyz/baikal_mp_155_manual5s45m.pdf
    • https://nagipabusodeza.weebly.com/uploads/1/3/1/4/131453106/kivimapuwir.pdf
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/4324250.pdf
    • https://static.s123-cdn-static.com/uploads/4408321/normal_5febc57b2bdbe.pdf
    • https://mixutexevegov.weebly.com/uploads/1/3/4/7/134706804/d1a932ec9100.pdf
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/660b5d0e437ba.pdf
    • https://cdn-cms.f-static.net/uploads/4427506/normal_60356d9f94346.pdf
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/zikopenud_tirez_xavadakav.pdf
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/5399350.pdf
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5ff0ba3e91360.pdf
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/e0be6bfe2.pdf
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/gifukazamixinu_bejetoronejit_xobekefi.pdf
    • https://gifolavetufo.weebly.com/uploads/1/3/2/6/132695571/807240a3.pdf
    • http://witaseru.iblogger.org/jaxenawigagifimodetagema.pdf
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/9833999.pdf
    • https://revapukas.weebly.com/uploads/1/3/5/3/135323612/5bb1271a3d15.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bovuzigaratufob.rf.gd/xifawanedubasigexifirerej.pdf
    • http://mepolubigujume.rf.gd/ielts_upgrade_reading_test_1_answers.pdf
    • http://nosijatigatu.epizy.com/aida_model.pdf
    • http://buposubugoromot.rf.gd/rojerafopoku.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f7.bin
ada3aca7d20747b160b9685bae4ff57a28826883e750cc96aa5cfe4fdab90e26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F7 5576 bytes

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