Malicious PDF — malware analysis report

Static analysis result for SHA-256 a025a3f32703255f…

MALICIOUS

PDF

71.2 KB Created: 2021-02-13 00:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 260be51bf7b2047ed0b2c67190eec03d SHA-1: 40e8069bf0c565e890754d7f555adbdfad3a5ccf SHA-256: a025a3f32703255f2752e3f5f12190e3871700fb76c9f5468e27f2743a484fc5
196 Risk Score

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 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.
  • 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://baarspo.ru/wix?keyword=in+a+silent+way+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371013/normal_601904d4a71c3.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/7556082.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/43ea18740cb5b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5ff7803e07cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_6014e12bed6e7.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/9820329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_6009d97fc4ddb.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/156089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_6011cdcdcc0b3.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/tigewibejageju/cantina_band_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/sigisamowemep.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_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 5076 bytes
SHA-256: 23bf04f6813bb1938a9657ebc8714a9303070713c933d8e3b4988700d39d6bce
font_01_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 10412 bytes
SHA-256: a63e67685dc524ccc63d700b1b8abfe51092e39d6da535809097b8a0beb1ef6b