Malicious PDF — malware analysis report

Static analysis result for SHA-256 59018c1367284fec…

MALICIOUS

PDF

73.1 KB Created: 2021-01-25 16:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f10d29edbd5f54a6983fba310519756d SHA-1: 254a4304c5b950ce9618ead318f8d9ee69746413 SHA-256: 59018c1367284fec35bb37bb7eb086380da9c2f480b21ebbd10634819457ebcd
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware delivery document. The presence of a link farm on disposable hosting further supports this, as these are often used to obscure the true destination of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://baarspo.ru/123?utm_term=watch+wolf+of+wall+street+free PDF link annotation
    • http://normaa-id.com/83389702550xf41d.pdfIn PDF document text
    • http://info-pages.ru/bawenalamigiwhoir.pdfIn PDF document text
    • https://sinekamawo.weebly.com/uploads/1/3/0/7/130776883/gawobuxopi-gajixufofoz-siwolowexex-nojinemanitexi.pdfIn PDF document text
    • http://macsk.space/91729224055z4ha7.pdfIn PDF document text
    • http://urott-hu.com/age_of_war_flash_game_musicnwmlc.pdfIn PDF document text
    • http://trenketo.buzz/nanebisesanowuroex35b.pdfIn PDF document text
    • https://gofetudorupu.weebly.com/uploads/1/3/1/4/131408581/7718927.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/5647191.pdfIn PDF document text
    • http://manybigs.space/arizona_state_parks_camping_passyqm1j.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/zunebareniv.pdfIn PDF document text
    • http://italysummer.fun/3631331665659qei.pdfIn PDF document text
    • http://idealica-official-it.website/bukubujafuzulapesogpqa1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ditiruz/jinja_template_iterate_through_dictionary.pdfIn PDF document text
    • http://kujafugakare.epizy.com/jefukupamumutuvajafelukot.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/lagexoxalopakugixizoleg.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 5076 bytes
SHA-256: bf8539d2c1beebc82a057f0cc1d2bfaaae75d702188a5fad5d0753d0ddcff6aa
font_01_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 11088 bytes
SHA-256: 3cdf5042977b09dc38282b6a0c928e4640fc0bb3e75587f6bdcfc01195a93cad

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