Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdfd7a8991eff94…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 11:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c846aee1126bd5d056ce1716d225a900 SHA-1: 5b452937a51482748e304e4fe850a3e113237430 SHA-256: bcdfd7a8991eff94b75f48c48bf23fcb28e4d5746e1781199319b0e0870387ab
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=gw2+aurora+awakening+guide PDF link annotation
    • https://cdn.sqhk.co/demejapad/gHIjbi8/red_rose_spa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fddc6684ef3c.pdfIn PDF document text
    • http://ins.expert/c_r_p_f_full_form_2019rcawh.pdfIn PDF document text
    • http://onsideball.info/exponent_rules_review_worksheet_answers0cgk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366401/normal_5fe23da644d1a.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/hKjcKhe/13892952473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5ff55844efdfc.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/xolawaj8srzj.pdfIn PDF document text
    • http://cesaregaspari.com/cub_cadet_42_inch_zero_turn_partsdiaib.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jqIicjg/jividesafikezi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5ff4c98aa2e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_5fd15ec0a4281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_6022bb198d0ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453108/normal_5fe7d722e42b7.pdfIn PDF document text
    • https://sezunugavekavo.weebly.com/uploads/1/3/5/3/135321765/jemapusaz-rupiponasafav-sofedagasox.pdfIn PDF document text
    • https://cdn.sqhk.co/xonafelog/iiNXuRq/73718223761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490375/normal_600d94d42b34c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD336 4904 bytes
SHA-256: c88029fa80d36a382e67ebc38dcb5c27c25a99a919bcc494da3a6c03ee29ac87
font_01_sfnt_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 10780 bytes
SHA-256: 187c48793a79c6314124ca9bd8f0f061540117c5e0e772d0f6215093ab8958e4
font_02_sfnt_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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