Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4fa15ca913d4e4…

MALICIOUS

PDF

73.0 KB Created: 2020-11-16 22:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40e0232536aab42c7ce7801ce7eb9e4a SHA-1: a80e57236f45b6ea7dc4c46d2816611dc77b3c34 SHA-256: 7e4fa15ca913d4e4f623f6d8663c52efb0d4d98ab37f3eae13e9b826684da8be
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://traffine.ru/strik?utm_term=antiarrhythmic+drugs+pdf'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were explicitly extracted, the nature of the redirector suggests it's intended to lead the user to a malicious site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=antiarrhythmic+drugs+pdf In PDF document text
    • https://wuvozova.weebly.com/uploads/1/3/4/5/134500004/jixapavirusun-rawafowi-fojekitinivotig-zemivexujega.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/gokur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fa575cbb0596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_5fa3ac321e2a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f87c4ab6c8e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419451/normal_5fa9dc0945aef.pdfIn PDF document text
    • https://sojasokavipives.weebly.com/uploads/1/3/4/6/134677313/bewuxek.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/xumakomowi/35971844678.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/84031743988.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/printable_marauders_map_invitation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/huntingtown_high_school_football.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/pebivilewe.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/documentation_of_clinical_pharmacy_services.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD512 2960 bytes
SHA-256: 3c6502e04658d985b37ed967139d4b1bb7136c1c8ff06868e6b64c17630b7d50
font_01_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 5628 bytes
SHA-256: f470e2685631b5ef54d3c2ae73ff711beda9394a882d21f0d62d54dad9651276
font_02_sfnt_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 10708 bytes
SHA-256: 92469462435ccfd583b5e6cf6dd45f7cc36620f4d973ee9cf9819037942433c7

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