Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a4a845baa25a00…

MALICIOUS

PDF

75.5 KB Created: 2020-12-21 08:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cf6f2a6722c44e7641caf27e117a73a2 SHA-1: 3b5b682e7593e35ee2d8872634042cc84ade9a67 SHA-256: 11a4a845baa25a00ae22c0e0fb3027f5eb7395b4e59635ac994ac0e7a8310ab3
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://traffking.ru/strik?utm_term=break+bricks+game+for+pc'. This URL is likely used to lure victims to a phishing site or download further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or malware distribution attempt.

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://traffking.ru/strik?utm_term=break+bricks+game+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4530323/normal_5fd86ddae7ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484821/normal_5fbbe086bb4ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5244db46-44ca-4ef6-98d4-fe98bc84e422/xonuxogifepipuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d4ec69-1db5-4ce1-b628-323fa7575509/59168542314.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/powopipawijo.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/66075535435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28d483f-944b-4234-991c-284919ee1f63/41459359838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59493a68-4a82-4e62-a8d0-10311be6d7b9/horario_de_Oakwood_de_bodyplex.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/57461869373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a311d51-5a8f-4fa8-8c4d-3f863a705218/organizacion_lineo_funcional_ventajas_y_desventajas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752fff2e-dba2-4fe4-9d4a-82d9406bbe7e/final_fantasy_ultimania_archive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8842491f-6f3c-4b34-bacd-0892e6cbc40d/wogodit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12842bcc-3d1d-4558-9bbb-388fd9a2570d/33878865941.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_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 5556 bytes
SHA-256: ad3929397357f85b7a8dd619a3002c002b53e9eeaf823d3ebf526926a9e5e791
font_01_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 10828 bytes
SHA-256: 5fe0df2c7979ead5b97ed25d736903391e531a761d2140fba828caff3fb64e57

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