Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a22b972056e9cc2…

MALICIOUS

PDF

68.0 KB Created: 2020-12-01 11:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 021c011c7a3ccf0dd5acded7bdb65daf SHA-1: ebf4e20962a23165e977962cba5c37a6fa4bdcfb SHA-256: 1a22b972056e9cc2e226250c38851497391ddf36eb2bf8944fa253dfe53ab921
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to 'trafficel.ru', which is likely used for phishing or to download a secondary payload. Although the document body is heavily obfuscated, the presence of the malicious URL and the PDF structure suggest a phishing or malware delivery 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=synonyms+antonyms+ks2+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479237/normal_5fbf55025ee81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f8b688804379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5f96207c2de3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5fa42e6325f2f.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/ninazarila/90533470890.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15a4327a199023ab881d8/t/5fc5d9be1972c46e3c69385c/1606801855362/60442488346.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/movement_disorders_journal_submission_guidelines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc6dc14dfd36fef0f123/t/5fc0d7644f98375720ff7a90/1606473572866/patupepozobalilu.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/tumuvoguwogonever.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfddb5147b14804f90714/1606286840593/community_circle_questions_for_middle_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10966a879396864091016/t/5fc1e3e53485235c860b60c4/1606542309881/80729294223.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/purpose_of_dryer_thermal_fuse.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3963c12facd59cebdd614/t/5fc491f0145a8629dc42a805/1606717937089/abigail_simon_dateline.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_off0000cb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4B 5384 bytes
SHA-256: 8167680f4ce2ad84a402ad35dc928263ea8d5ff27e990c2c13a8ab0fe6ac3632
font_01_sfnt_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 11204 bytes
SHA-256: 59c47417eed57cc314b0f1e2e16bc8ade63cee15c50fef1f5e00a54a7230afd8

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