Malicious PDF — malware analysis report

Static analysis result for SHA-256 f081d5e7e7022a9a…

MALICIOUS

PDF

67.5 KB Created: 2021-02-17 09:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5c66f798c1c223309578dba74e7c7da7 SHA-1: 6cf387b5d668d01c4b09b4b8c101240eadb7fc62 SHA-256: f081d5e7e7022a9a5ca8a75856768ff98b07ed07bbb7b081e6774d540812d7c4
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://jacksth.ru/wix?keyword=top+gun+hat+meme PDF link annotation
    • http://wiforopevubane.22web.org/68855042777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5fcc1b36272d5.pdfIn PDF document text
    • https://wimafepe.weebly.com/uploads/1/3/5/3/135326366/sopuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fd921037a2b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_6026e954cede8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_60203d9a88db7.pdfIn PDF document text
    • https://rubitolagaju.weebly.com/uploads/1/3/5/3/135330326/rogedipimenib.pdfIn PDF document text
    • https://futibiwis.weebly.com/uploads/1/3/1/4/131408183/4026944.pdfIn PDF document text
    • http://neliwiveles.22web.org/pefexomapiferagasusateg.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/wujafivabipo/12547348485.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/ninetejamakatujogisaduwo.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/86702867866.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/kupupideketavaxabeledefut.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/secret_text_forwarding_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/msi_afterburner_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/rent_agreement_stamp_paper_format_in_urdu.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_off0000cd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3F 4876 bytes
SHA-256: 4c89db1c449ac4cc0fc6ad02bdeeed99cf4a9ba08fac77266243016508ec0748
font_01_sfnt_off0000ddb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB7 10336 bytes
SHA-256: 38437e4a0d3f459b28b1ec57eefc45fbda98739ebdf628be98e53daa170efd5b