Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ab67bc114411cc…

MALICIOUS

PDF

65.5 KB Created: 2021-02-19 12:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ece5fddc121798cfad4c2141c8819f6e SHA-1: 2f7e167ef9d9e515837efc4e50dfc89d7c69fb83 SHA-256: 85ab67bc114411cc5819ef28ef1f03bc4ce35d238336f8d435c542efc339bf4d
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=hampton+deluxe+cruiser+bike In PDF document text
    • https://static.s123-cdn-static.com/uploads/4381302/normal_5fd044ab4181b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370089/normal_5feb8fcf0ff70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5fd289b779d75.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/juneres-mazotikiribofor.pdfIn PDF document text
    • https://zuzuvisaze.weebly.com/uploads/1/3/0/7/130738998/delubide.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/nazuzudamitili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_600b75a6c9065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388839/normal_5fed665a20bf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375518/normal_5fe5f6e1b6bef.pdfIn PDF document text
    • http://bogavevi.22web.org/49202940971.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408879/normal_60092c9a4ee17.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/dijuxaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_6027e5fcef456.pdfIn PDF document text
    • https://juxapokidopelif.weebly.com/uploads/1/3/1/6/131606881/dibapex.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/fapaga/sintomas_anemia_falciforme_artigo.pdfIn PDF document text
    • http://dinixebun.epizy.com/folder_template_design_for_company_free.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/baserekijakab.pdfIn PDF document text
    • http://wometopususap.rf.gd/1494172376.pdfIn PDF document text
    • http://wigugagekubog.rf.gd/3806262572.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/dudaxidokejisuto.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_off0000c386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC386 5452 bytes
SHA-256: af998d9ee28d458d876061fedb0ba098fb2d384753a2f146efb2e5fa2684a565
font_01_sfnt_off0000d5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EF 10260 bytes
SHA-256: 867beaa66f148483b680ca38bf14838ae213e762a470139084c21aa400192cd3