Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e3d50578dce17c…

MALICIOUS

PDF

79.8 KB Created: 2021-01-23 22:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 743cf2efffe2944761981334df115e6d SHA-1: ed48d82f945f9e83b6f345c3ea51076cea9faf60 SHA-256: 56e3d50578dce17c1f8cbba137d4f5869c5a78b50e1a0abcc12ef6d951186b4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=things+fall+apart+short+response+questions In PDF document text
    • https://cdn.sqhk.co/jafetegupam/cZljhd3/final_fantasy_iv_psp_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/Rf1gcih/microsoft_azure_training_in_hyderabad_kukatpally.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/rvPigji/among_us_coloring_book.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/ghSjaij/xedibovixokibopujog.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/j2bhegc/ford_raptor_pickup_truck_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_5fee0d73d3558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383792/normal_5fe1eaf702ce5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_5ff84444c2a71.pdfIn PDF document text
    • https://site-1255784.mozfiles.com/files/1255784/97184926504.pdfIn PDF document text
    • https://cdn.sqhk.co/zepinima/1J8jiQC/mixogoxupafitoza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5fced6fb2cddb.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/2EGhdje/3240725960.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/jME1hcF/vexebekizos.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/zumezeviwakiz/charlie_chaplin_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/wavivuwezugunepa.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/chirutha_songs_teluguwap._net.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/52828343600.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_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 5236 bytes
SHA-256: b825426721bfbb0d692de49cd90572013de2f82416c5a0c19a256b79b9644d5c
font_01_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 10672 bytes
SHA-256: c1b5a2434c2d1cb311bec4bd8f2a2a4452d1e0d4b1f7a03f2cd3f23f4074e7d0

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