Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17de2ac10d1ae24…

MALICIOUS

PDF

70.7 KB Created: 2021-02-11 23:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 58771b69c5c897ac2f07b789dfb67d40 SHA-1: d842e15e6a5662f3ebb81417817f4182a2a9a7ca SHA-256: c17de2ac10d1ae245e76abf94241869161bd022bab9ba259fadc7d1bee2702f9
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://druttle.ru/wix?keyword=the+unwanteds+quests+pdf PDF link annotation
    • https://cdn.sqhk.co/wezupobuwab/gGRChbc/wipipejizunoxadaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5fd2ac7087dba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403673/normal_5fcf606cd8044.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/Hje7pjf/outfoxed_documentary_transcript.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428069/normal_5ffd3f909ccda.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidaxiwuk/ic3zij8/pocket_penguins_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/hiihggE/wuwotufejazazewew.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/75e493f76477.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/TN6giic/21753517414.pdfIn PDF document text
    • https://cdn.sqhk.co/kopubeno/SLGrxpR/pajowojivemikup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421937/normal_5fe4e3d3ca44a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454287/normal_5fdc3bb4dd968.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/e2gdPgg/11294255493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483591/normal_5fde86e473dde.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/JhdUhjb/strange_facts_about_mental_illness.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404750/normal_5fc74b4aebd09.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/heiDIgg/dark_knight_rises_villain.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getakufo.epizy.com/dividing_decimals_worksheets_6th_grade.pdfIn PDF document text
    • http://zobotipuzadevi.epizy.com/88161253787.pdfIn PDF document text
    • http://rilijoxedu.rf.gd/nisikugezomowurawipagu.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_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 5168 bytes
SHA-256: 5fd923cce1b2aff53dc4d92b9e3afae02077185de1c2bf2feac3bd449bb25635
font_01_sfnt_off0000ea6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6F 10464 bytes
SHA-256: a8c7466c36d47d45de2afabca536c7ad6d1477286c378727f7a79f054be0753f

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