Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd5a5fa39703bdc…

MALICIOUS

PDF

66.8 KB Created: 2021-02-17 11:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 468b329eb24a0728a5ca0d618ca1cd1f SHA-1: 54f943f03775e79b4f3af1f0b0b9c27e00ec0c1f SHA-256: bbd5a5fa39703bdcf2231435b8353891c20502ad7ddbdc8b530dcf6e996b5ddc
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=basic+anatomy+for+the+manga+artist+pdf+download PDF link annotation
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/c81b167.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/6603415.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/josukojozuti.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/09841d067b377.pdfIn PDF document text
    • https://zapodebas.weebly.com/uploads/1/3/1/4/131437158/8765f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_6003dbae0f697.pdfIn PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/4563311.pdfIn PDF document text
    • https://ruginimurixibiz.weebly.com/uploads/1/3/1/6/131606491/7044847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450038/normal_5fd5f5e6b8257.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/pazovugal/wing_chun.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/casio_edifice_eqb_501_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/noxixegasewarusas.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/26913970103.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/cv_template_doctor_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/67065806030.pdfIn PDF document text
    • http://fezefujeziged.epizy.com/tafuvifonoganeguv.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_off0000c748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC748 5812 bytes
SHA-256: 85d36ba8138019a4580493b0d81264a8fd12c55eb8b198e61362cda07fc1ab09
font_01_sfnt_off0000db08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 10128 bytes
SHA-256: 69d8730f8300c781a3c29bb93fc62ba0c9f9f47bd89f0fc56d5775f7f5e39edf