Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e139de52f65712…

MALICIOUS

PDF

57.2 KB Created: 2020-11-21 22:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f80080d65a19c0d34637fb07ecad6e33 SHA-1: efd665a77fcbd09fc9888ad2f49c047f1b01e887 SHA-256: c0e139de52f65712f12507dc23da370d577bc3882da1adc989016bc8d9ffbcdf
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 'https://cctraff.ru/aws?utm_term=animasi+gif+bergerak+lucu'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, characteristic of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=animasi+gif+bergerak+lucu
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5fad78f2c06e5.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f9a18c16f494.pdf
    • https://cdn-cms.f-static.net/uploads/4466379/normal_5fb25cf070936.pdf
    • https://cdn-cms.f-static.net/uploads/4407064/normal_5f9e4a12db43b.pdf
    • https://cdn-cms.f-static.net/uploads/4413008/normal_5f9da42a265d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mejigavukolu/85925955076.pdf
    • https://s3.amazonaws.com/rivazixexuguri/wonderful_christmas_time_piano_sheet_music.pdf
    • https://s3.amazonaws.com/bivanud/cat_burglar_mask_template.pdf
    • https://s3.amazonaws.com/sakaburepagase/fikibujivudugivobiterasoj.pdf
    • https://s3.amazonaws.com/paxivogedewilu/donumewaforoximuge.pdf
    • https://uploads.strikinglycdn.com/files/2c558ec7-7347-4c0f-a3fc-858df24d36fe/81686058502.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a66d.bin
83462dcbc1db02cb01b085536831153b9afcc847a8e07042d80ba6bbd4c99209		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA66D 5396 bytes
font_01_sfnt_off0000b8b8.bin
3cc9c5188c593400ebcb9de45578893b2b445cce926ca78262269bfdd8e04967		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B8 9308 bytes

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