Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ad86ed36551e5a…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 14:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d5429982ea84c2c983a098d7cb76fadd SHA-1: 086bb3c59ee42ad7b73a25fb9c47e4aa2b318b87 SHA-256: 74ad86ed36551e5a5fa577370a71311c4343ae358132e394d2d8f705fb2938f9
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://pelibifir.ru/award?keyword=how+to+reset+tpms+on+2014+jeep+cherokee PDF link annotation
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/patetanasoj.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/jhcbih5/36431953187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5fe235462e606.pdfIn PDF document text
    • https://govodiroruje.weebly.com/uploads/1/3/0/7/130775462/6101429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffaca874edad.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/gcibohd/98311677536.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/fricHhf/terraforming_mars_expansion_board_game_geek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459937/normal_6003a4b447dcf.pdfIn PDF document text
    • https://kawuzuvom.weebly.com/uploads/1/3/1/3/131379118/tupovanakijisoz.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/hRib7ih/985583610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_5ff86c0ec594a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://worizekadi.epizy.com/illegal_websites_to_free_ebooks.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_off0000e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 5536 bytes
SHA-256: d0a5bef7596151349dc332a34aefe9329e818c30e22b7c4342f6803c69129e4c
font_01_sfnt_off0000f4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C6 10196 bytes
SHA-256: 4a1265f03d7488fc6e102de26c245b14c934dc366f348073180d2dc59c67649a