Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75b3594fe8dfe17…

MALICIOUS

PDF

68.0 KB Created: 2020-11-24 09:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ff5bc216c6afd794211ea9aca5c1f94e SHA-1: bee9a59aeb7f14699cd96b41835b0c4794ae273f SHA-256: b75b3594fe8dfe17e8dfe262d44e74a1021406c15196a4b297b9b3fe1e9e30d5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffking.ru/aws?utm_term=android+make+apps++to+sd+card'. 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.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=android+make+apps++to+sd+card In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_5f984dd78adde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_5fb9f498a59a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468540/normal_5fae59c1eb63f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5fa667f6e974a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5f8c0f601fe43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5faf4373da435.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/zunaduxa/7659107432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d8b4a7-2689-42c8-a273-665df912139a/56938229558.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/simple_lease_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/bluedio_t7_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c1e654-07c5-4c71-b467-bcea966c1f3c/wiwigiduv.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/43984200442.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/local_hot_shot_driving_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/20663117485.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_off0000ce98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE98 5240 bytes
SHA-256: 017140f771bc193bffa8c428de70dfef729aba3a38b4fcd6de494272e3e9d28f
font_01_sfnt_off0000e054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE054 10208 bytes
SHA-256: 996debe76a7989e7a893f10e60cb75ec601ad663ab8668259511aaac06338bf4

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