Malicious PDF — malware analysis report

Static analysis result for SHA-256 c126960d563c6ba4…

MALICIOUS

PDF

151.5 KB Created: 2020-12-16 19:31:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 654ed052ee2fe9251b97496b4a137a9a SHA-1: 25167f5c73ad9977dd3d68d440722ac2c2f26f92 SHA-256: c126960d563c6ba4bf5b0301380819d542000992ca6527028d25da83463f55ea
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/strik?utm_term=bunn+coffee+grinder+commercial'. This URL is likely used to lure victims into a phishing scheme or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/strik?utm_term=bunn+coffee+grinder+commercial In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5fa4a7d3c0cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5fa7784835484.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/wizidimawag/alien_shooter_pc_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000b0574-3ff6-43b7-86f5-accf9c945265/fawasaxulewevidawiri.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/zumomewulemokudunum.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/7_characteristics_of_useful_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceaaee85e0c3327ca2c13d/t/5fd013e375371c172f24a232/1607472100261/31606943747.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/golf_channel_comcast_minneapolis.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/xixogeluropenosobosabe.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/directv_cbs_channel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/memes_clean_funny.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/aprender_ingles_app_android.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_off0002192c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2192C 5212 bytes
SHA-256: e4e19332da6ee2c976d057772086e15efcdc4b5a16152e285b102320c03a9696
font_01_sfnt_off00022ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22AD0 11100 bytes
SHA-256: b1c2fdb2c0a5547227a1b11859d0b2fb60acbfe3a6d9676c851b432fc430dd5b

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