Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf30929cbbbe04e6…

MALICIOUS

PDF

66.6 KB Created: 2021-02-24 07:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bd6b470629a3095b6552cf47f96e2b7d SHA-1: 78043702d29d521f3dee4d0456de18ded4213787 SHA-256: bf30929cbbbe04e66f145081185946bb300f709855439057cb7b05352c2f8775
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://bologen.ru/123?utm_term=why+ethers+have+dipole+moment PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497368/normal_5ffd65092c28d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407818/normal_5ffca0532dae3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365649/normal_5fcd50923c0da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5ff96d5e995d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_602d7b586dbb6.pdfIn PDF document text
    • http://parkji5x.xyz/dominos_employee_handbook044qc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_601f8758e9aaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fe06fbeda586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5ff5c66ca167c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454558/normal_5fdf6612a6b0d.pdfIn PDF document text
    • http://steblin.pro/pejulojelolilir4gid6.pdfIn PDF document text
    • https://votokivefanatu.weebly.com/uploads/1/3/1/4/131453133/4990398.pdfIn PDF document text
    • http://jumbochecker.com/napikotavamozelut51i18.pdfIn PDF document text
    • https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/kusasejef-zuvuwiwelewu-fepuvikikapil-bonew.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/folase_duxisugitafo_kiwigepanuruzi_xepipuwufuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC932 5376 bytes
SHA-256: 54bd405bebc6bbfa0f2ee47356bae5485e69692b9edd4d5e39ee4cdd69542499
font_01_sfnt_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 10092 bytes
SHA-256: 417891b084f8c0c6936bfcbfa4e26af75fe5bea0bbed8e004563b1c5499567d9

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