Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac4deed053112b2…

MALICIOUS

PDF

67.8 KB Created: 2020-12-23 14:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c45f292b751c69a63652a101f15dc7a9 SHA-1: b7695c5ab3e9eb78931e571acf80ab38880ab6d2 SHA-256: fac4deed053112b25a64e1b83acc65d510659b6f617b495c027ff13e145427da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://ggtraff.ru/strik?utm_term=rummikub+how+to+play' is the primary indicator of this malicious redirection. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious purposes, likely phishing or malware delivery.

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://ggtraff.ru/strik?utm_term=rummikub+how+to+play In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_5f9b81258f48b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450248/normal_5fc7d290daec7.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/dinigugaxej/activate_office_2013_kms_manually.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b0498f-0343-47f5-8549-22f666c62e80/darubefipekedasomodilaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7390c92-de22-40d4-93cc-0182f8873f82/4718678838.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/26732164338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6c7f3a-5b21-4082-9b04-0f12937a754d/97085979679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157f8f84-d359-44bd-9454-e31b11f72011/vagitinoju.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/heterocyclic_amines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7323183c-b037-4225-8df1-aa8c8b0242e6/aile_arasinda_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3793c16-d5a9-437d-8f0a-3d248b588b71/joe_michaels_photography.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/health_care_aide_interview_question_and_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f0edb7-5716-4c67-8142-9feaefb4592b/76446944476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8170e125-3c18-4c3c-925f-64c4d901fb52/xurudepokowidepas.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/5460758092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa44fbb-0ed3-47c0-89c3-1a1f19aff9e9/68823243740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0e4dab-757d-4f18-b774-042bda9ba6c7/gekopiveje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977fa82c-adfa-4936-a189-017ae46edb7a/jebigebudewiluluvavaloso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b6e7bb-f00a-4313-95c5-c42b548b3127/3549070825.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_off0000cd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1E 5188 bytes
SHA-256: e5279d290dec9764b344c76fdf89fba2be3f423d66c00121883074599bbd88a1
font_01_sfnt_off0000dec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 10348 bytes
SHA-256: ccf183bee62e38374837d3cf806bda956c98dd9957f346ea0f309797fd25f633