Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd91bd544861f816…

MALICIOUS

PDF

75.7 KB Created: 2021-02-13 21:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f68a3d9e7867903993a7c0ca7dd80dc1 SHA-1: b659619a27d250b1331e37b1a351a45397208ffb SHA-256: dd91bd544861f816c48698a9262f13f3f6eb2f1cc67bf30f132fda34068b06ea
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/wb?keyword=graphical%20resume%20template%20free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450507/normal_5fe3d8f8401ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489843/normal_601d3e263526d.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/ghPgfje/super_sniper_shot_qartulad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fe1332f2d7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_600f205956249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408991/normal_5fcb6b60a610d.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/ie26hfR/meteor_shower_calendar_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494432/normal_5ffed3a430c3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5fcb12cbdc6c0.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/divasupitewuse.pdfIn PDF document text
    • https://finiruxadaral.weebly.com/uploads/1/3/2/6/132680938/wazotozodemeri_nodulo.pdfIn PDF document text
    • http://wosatonosefenaw.iblogger.org/ffxiv_weaver_leveling_guide_50-_60.pdfIn PDF document text
    • https://wadidomewagu.weebly.com/uploads/1/3/2/6/132681938/3d7725f6559fd.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/benozidigogeve-zenivaga-felixesuliv-tupugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidukuj.epizy.com/73255695939.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_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 5284 bytes
SHA-256: ba0bc889ce2bf2cf52655faeea6aaa972268af3dd7d7f84abeaac88f40938a8a
font_01_sfnt_off0000fe36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE36 10524 bytes
SHA-256: 6291f7baa556f03f02593ac759855d62c3fde4ae5cf2ddf4b1e618679e3ab2ef