Malicious PDF — malware analysis report

Static analysis result for SHA-256 e938a63a3f0249ed…

MALICIOUS

PDF

70.9 KB Created: 2021-03-20 19:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 198551ef131f075a78d90a85c3f5f33c SHA-1: c888658d0a9a8f1cfca04dc1c7a939a8be6e3bb8 SHA-256: e938a63a3f0249ed8534229cd10f24191094851837553fe6b9c1b4fd9d649ad9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that employs a lure, indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic, to trick users into downloading it under the guise of helpful information like 'ansys cfx help pdf'. The primary malicious URL identified, https://druttle.ru/award?keyword=ansys+cfx+help+pdf, is associated with phishing. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/award?keyword=ansys+cfx+help+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5fdaf11c2d43e.pdfIn PDF document text
    • http://evilcheats.fun/plane_tickets_to_hawaii_from_atlantaim144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_600f44be06bef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485299/normal_600fa5360585a.pdfIn PDF document text
    • http://fb-ig-violation.com/tujuwtgkk9.pdfIn PDF document text
    • http://webpost.pro/pobewevljmui.pdfIn PDF document text
    • http://consequences.space/86758503035mzd9o.pdfIn PDF document text
    • http://socialwave.me/42557621048q6ga1.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/jotogorurekuro/64715394405.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/ahmad_shah_abdali.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/lurekunavominufi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/porter_cable_nail_gun_user_manual.pdfIn PDF document text
    • http://vipujaxetixise.epizy.com/bajaselorosaferavofom.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/jimibafusanerifexe.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/arcane_mage_pvp_guide_7._1._5.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/lagu_bfmv_fever.pdfIn PDF document text
    • http://kesewoge.rf.gd/latexol.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/nuxebobawofunananitokiji.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/arabic_writing_worksheets_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/ducted_air_conditioning_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA14 5096 bytes
SHA-256: 6cb28f8d74a6227385cda17e1187e42b06c747925e09790de8fa94735a011689
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 10268 bytes
SHA-256: 5f59e73a55cf621e7c637105a83f289459d7eadd184b857cb65c6e72cb6f46f9

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