Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f16bf9053fcd30…

MALICIOUS

PDF

73.5 KB Created: 2021-02-11 02:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3ae7ef483309dac89b0e9deea2864f0f SHA-1: 8eb9668700f7afe656547f6b3398fe2a24dbe4ab SHA-256: b4f16bf9053fcd3026279f4f459ad2081d70e7616972e7b602c7e9757bf92646
144 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=mass+effect+3+head+morph+files PDF link annotation
    • http://tekeriset.iblogger.org/2010_chevy_camaro_ss_owners_manual.pdfIn PDF document text
    • http://sizegivip.22web.org/juwovuvatabuwolekedulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fcf7dc4d19fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5fe5a586786c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410016/normal_5ffad9593eb78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417418/normal_5fe2559b99cee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5ff788ee5fdfa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobivovakebala.epizy.com/elle_vous_informer.pdfIn PDF document text
    • http://ratimoli.epizy.com/bryan_adams_discography.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/crossword_answer_for_furniture_item.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/79426311851.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/crt_television_repair_guide.pdfIn PDF document text
    • http://zuxorijafofonal.rf.gd/7814452314.pdfIn PDF document text
    • http://zelixedamaxux.rf.gd/biodiversity_and_conservation_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/allegations_and_mixtures_problems.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_off0000e21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21B 5564 bytes
SHA-256: 40829a22536b046b5a35786057a3795814f981800e251740af62947daa6f0847
font_01_sfnt_off0000f4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 10828 bytes
SHA-256: 7ae6fffd5de805a41b946acc80cc5bd406882097aff8975f47f308b3f0fb849c