Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a4ceacff1f5eb4…

MALICIOUS

PDF

69.3 KB Created: 2021-02-13 10:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aa4a8d71ba61ac704ae43ddc014760af SHA-1: 96479176216e6136bfc7202d101c32ff5fba9561 SHA-256: d8a4ceacff1f5eb4f92c1aa456c276975b83f549c5cf5c7257677872dee90ff3
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=50+shades+contract+negotiation+scene PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468814/normal_5ff24aa5515e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_60182ee93509b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_601feee89f80b.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/EWxihFv/digi_online_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5fee9d7b99749.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/dijanekopaz_kijidetezuz_zijewemo_rokofaxagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_5fd1a1d9c9645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5fefde4299839.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/9751190.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/o90eSja/tasipuxukofikeduxejezaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5fd5f290bab68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481170/normal_5fe0de6ba85ef.pdfIn PDF document text
    • https://xazalonabi.weebly.com/uploads/1/3/6/0/136086847/3580083.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/igJiaif/tagavegedokezopel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413013/normal_6003bdf7c3a72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD320 5340 bytes
SHA-256: 9e9c88596001fe816dead69ea79ad247b1d8de7c98dd4eb6ae02ee8c65c6113d
font_01_sfnt_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 10288 bytes
SHA-256: 1fddc1dde2e256649eebf62d8036fc9ea76f38a43729e0faf82084242100be9b

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