Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abb79119106da80…

MALICIOUS

PDF

75.4 KB Created: 2021-02-18 14:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 84915079377dea3457f7f866f32a4d29 SHA-1: 42503a5a1f68b343692c6c1a1d221dcd75f70258 SHA-256: 2abb79119106da806d58db38d3be8fbfb65e458f1e9df7a67e005401616a1644
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains strings related to 'imovie tutorial youtube 2019' and authoring application details, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://jottigo.ru/strik?utm_term=imovie+tutorial+youtube+2019 PDF link annotation
    • http://mebelintera.ru/fantasy_airships_steampunkcpidn.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/gj3sjhF/jiraso.pdfIn PDF document text
    • http://romeital.space/60602671727w63vc.pdfIn PDF document text
    • https://cdn.sqhk.co/kisetofekuzi/iegqjdm/photo_editor._layout._collage_maker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_60234b5e2d90e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_5fcef620d6631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_601df77867d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_60217f4f30af2.pdfIn PDF document text
    • http://liketime.online/vuwivefilu84y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_600bc9cd97e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_60209356777c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380707/normal_5fe24ea1ccd68.pdfIn PDF document text
    • http://golepikoxeware.22web.org/tegogi.pdfIn PDF document text
    • http://itchia.space/chromagun_ps4_trophy_guide0cz0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385038/normal_5fcb1563e51d9.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/bhbhijg/77355749335.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/igWNUid/92063484158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496585/normal_600a772f23aa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejarejunap.rf.gd/fadaponeku.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/miniclip_games_bubble_trouble.pdfIn PDF document text
    • http://zinezalidoratov.rf.gd/zadurujadumot.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_off0000eab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 5372 bytes
SHA-256: 1fe06b628370ba748dc2d8284b2013145ac0e9f59bd59ab86e9a7ee0c2e81f61
font_01_sfnt_off0000fcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF6 10184 bytes
SHA-256: 29e6866cdcf59739e5e94c7b2a34f68357af3c047524f0ef6c70db171ce529de

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