Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d145b630de14be7…

MALICIOUS

PDF

77.8 KB Created: 2021-01-04 18:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ac0a37c4da744bc4327b957435f2ddce SHA-1: 22aad14bcc93b0707f4080aaaaf6255bea181c61 SHA-256: 6d145b630de14be774883a848c3ca0c8e10d4f5f6571682022cf83383c756255
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Olx app for pc' and the authoring application, suggesting a lure to a fake application download or phishing page.

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
  • 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://trafftec.ru/aws?utm_term=olx+app+for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444366/normal_5fcff727837fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fe3378632868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5fa141f78c965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_5fa493b51d82b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5fb26760cd646.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379616/normal_5fcbe71958769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_5fe70b3d6e8a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/go_math_grade_5_lesson_11.4_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df30aa46-3e8a-4090-bb0a-2db96b0c1c02/liwobuzivenekak.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/joxaminizefuxixavezofu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/making_your_own_handwriting_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/fedetemiruxokoka.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/mod_download_apk_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c8580f-58c1-4386-9bf2-21954def72c6/shark_rotator_true_pet_professional_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/download_whatsapp_apk_and_install.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 4360 bytes
SHA-256: 4b9a440b822edb7d5ffaa0f9ebd4f888102f2d17911574b4e5f3d6b71e8a9ea4
font_01_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 10896 bytes
SHA-256: 7e1c7a867c0c6df3397520fb780815b15b995ca6e94a2edd92176592cbeac75f
font_02_sfnt_off00011cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.