Malicious PDF — malware analysis report

Static analysis result for SHA-256 e728325e964f78f0…

MALICIOUS

PDF

69.9 KB Created: 2021-02-04 11:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: aaff8b2ccac90906ab27985e6a4e3d40 SHA-1: 5d7ee3c75adbf8c1064866da67ca352a53582ca5 SHA-256: e728325e964f78f0757ce77977a2300fd8e6c969daddc9542fee438bfc84ab6f
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://maypoin.ru/aws?utm_term=que+es+movimiento+rectilineo+uniforme+en+fisica PDF link annotation
    • https://cdn.sqhk.co/vekuperik/ihEyZgg/laser_quest_shut_down.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/ejjjhqb/wetofigakulirej.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/cihhejf/vajiv.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/67awmRl/general_grievous_costume_kid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5feeff39e77fe.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/gditSih/2508249074.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/6538067.pdfIn PDF document text
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/5a712501.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403806/normal_5fc849574ae64.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/ghgggjc/watudodiwifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408471/normal_5ff80aacf39bf.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/vavabi/lufajezabatu.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/xuwubof.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/fidepusasog.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/interpreting_line_graphs_ks2_worksheets.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_off0000d0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F1 5148 bytes
SHA-256: fd2680a60446f762268d0bdd4676e33d28fe1a999fb0056a1d53c602c4f428e4
font_01_sfnt_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 11748 bytes
SHA-256: 262d55c79470fe85a871690d500c889c044a521d56b0b0003c43a53b19924152