Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b3b38b4c4298f1…

MALICIOUS

PDF

69.4 KB Created: 2021-02-19 01:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 266755c943874ad07b90f4583eba8cf7 SHA-1: db2a3b23c59b8880e78619c782ae2b87a424e9e2 SHA-256: c7b3b38b4c4298f1da5b0258bdcedff7f48bc3591fa028f06cec822fefba9ca5
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=i+am+poems+template PDF link annotation
    • https://cdn.sqhk.co/wajidafix/R3Bjehf/vukexugofuxafijaduj.pdfIn PDF document text
    • http://circulshtangcalip.website/71351820479f2ykj.pdfIn PDF document text
    • https://rarifipive.weebly.com/uploads/1/3/4/1/134131304/4932961.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/NgdqhgV/wodapalooza_2021_tickets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_602e661cbce6c.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/uWuGggQ/wordscapes_level_8237.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/faxaxos/mokurejutevekakuwijikol.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/wamujalezatewuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/dopewanakononefiverubemi.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/54179541990.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/zafuxaxovukevonenulesibu.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/jetidaxi.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_off0000d639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD639 4804 bytes
SHA-256: aa76ba2bce01ec75a6580af52b93211ede0b18351ed865781e161b487b99311e
font_01_sfnt_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 10092 bytes
SHA-256: 0db75f504813b1842b8ae8998b4206d22081e465699fec4d7756d3dce74952d5

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