Malicious PDF — malware analysis report

Static analysis result for SHA-256 92667a032ea6ee44…

MALICIOUS

PDF

101.0 KB Created: 2021-01-06 05:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9afc9431a6672f226b2dabb40c664668 SHA-1: c13e4432a0c530a58dd0e3f5083129146d0761c1 SHA-256: 92667a032ea6ee4473fe2ddabe3e278764f1503ae1424e3d50aa998c931fdcfd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=rcbs+ammomaster+progressive+press+manual In PDF document text
    • https://tujeliwavujojow.weebly.com/uploads/1/3/5/3/135304707/sunugujomatosemabu.pdfIn PDF document text
    • https://towimoni.weebly.com/uploads/1/3/4/3/134340956/3946151.pdfIn PDF document text
    • https://lofidebonejiniz.weebly.com/uploads/1/3/5/3/135334880/7241040.pdfIn PDF document text
    • https://jevebuna.weebly.com/uploads/1/3/4/5/134594548/2814602.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/dokiroxowewomakojo.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/6b419212-75cf-445a-9419-ae501c67807f/converso_de_bases_numericas_exercicios_resolvidos.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/ms_excel_exercises_for_college_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929f52ac-5e25-4be4-b62d-aad1a8f8f8fc/the_crucible_test_act_1_and_2.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/59928422730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/985b534b-0902-47f8-887e-d0b48aafc28c/lejizabugejemezojekep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440dd146-ff58-4f28-8ad2-7eee9d42ddb6/powder_guide_vest_north_face.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/debenhams_mens_shoe_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9009e21e-7bb7-4c2c-b3b4-5efecfe134fe/55281806819.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/57308738665.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_off00014be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE9 5460 bytes
SHA-256: 23c7518ab3b9528a893bc47e018b8f3bd14a24bfe2f3a0a93cacec143aa2cb9f
font_01_sfnt_off00015e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6F 12004 bytes
SHA-256: 31d7a7563b26ddf66b14b7b59623dc1823efd6c3ffcf4704a8e0142c8a2ca96d

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