Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7c4f8142e10a8d…

MALICIOUS

PDF

72.1 KB Created: 2021-01-17 15:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 529dc0e0fcf63da154a807e8a37b10e4 SHA-1: 9170236dfe87db3e47eb559d8549a26eb2d8f510 SHA-256: 3c7c4f8142e10a8d8bd7a55302de8340bc2b501d9dd1dc0828d4f44333096313
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 indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL suggest an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

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/aws?utm_term=bollywood+music+video++for+mobile In PDF document text
    • https://site-1166621.mozfiles.com/files/1166621/50129858938.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/9Amug8b/68826185402.pdfIn PDF document text
    • https://site-1172367.mozfiles.com/files/1172367/25538875414.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/fDicfif/real_crickettm_20_android.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/gVBggL5/rekabirukabevefipilekal.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/red_bull_space_jump_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/gi3QhhU/dilewakafepabedegaxomako.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/vikukinumet/gibiza.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/vakirosodopazugagesig.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/lg_v40_review_tom_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/buffalo_wild_wings_nutrition_info.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/boost_program_options_count.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/10441601071.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/malformaciones_congenitas_del_utero.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/mp4_movies_avengers_endgame.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/video_er_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/52942029295.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/tadacip_20_online.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_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 5400 bytes
SHA-256: 8998dea582ff6955fb7918cab5631ca4ea610cc8e7c82d6d50b73e1ab3cf476c
font_01_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 11212 bytes
SHA-256: 64e0ac64ffcec3a1aa1249a492617a2e590bbd29c6f9c0883491b8ae1da4e06e

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