Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a0d3110da66998…

MALICIOUS

PDF

65.2 KB Created: 2021-01-14 17:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cb5e3eacb37d0bfd974e1cccf5274164 SHA-1: 9402d9d98f5a7077b7bb64afd2c1211c86d25a93 SHA-256: 86a0d3110da669986b2b3f2a2b9b536475da4d2dfe2b02e55159621eb8fedfc4
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/123?utm_term=song+from+the+depths+quick+guide'. ML classification and ClamAV also flagged the file as malicious. The presence of embedded URLs and the nature of the redirector suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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/123?utm_term=song+from+the+depths+quick+guide In PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/hbie3Ql/barcode_scanner_camera_android_studio.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/ihYWjbQ/horse_kick_pro_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444657/normal_6000409ca1efd.pdfIn PDF document text
    • https://veminimuvaw.weebly.com/uploads/1/3/4/6/134630651/purogajunapefikubajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5fe4609423cc0.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/iah1iiL/rolling_ball_scrolling_in_sky_apk.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/438723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f87524f349e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fc9d18cef7c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5fb2ef0b3cba5.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/sazixipame/samsung_washer_and_dryer_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/awei_t8_manual.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_off0000c1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BD 5620 bytes
SHA-256: df756a85bef03999ffb32624dd741f7d30ff8c980876d5da662d158ef51d6dab
font_01_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 10368 bytes
SHA-256: 9e92a977a625c017714a076ae2ea9807fa4374fe5cdf10eb4c4fb8b0ef60c897

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