Malicious PDF — malware analysis report

Static analysis result for SHA-256 273b0e170ca8f79c…

MALICIOUS

PDF

73.0 KB Created: 2021-01-05 05:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 125ef8e0acfb429af97746389d26ebe0 SHA-1: 4590215b8a7b971456854af9193fcf6438cb5e33 SHA-256: 273b0e170ca8f79cc4e553379d5b113e87a4a08bb8b16b167ecb9aedd8624f0d
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure for a free PC game, likely to trick users into clicking the malicious link.

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://cctraff.ru/aws?utm_term=tetris+99+free++pc In PDF document text
    • https://cdn.sqhk.co/puwukuwos/eghjfha/wunegefinagevurev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5fd3279584ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f949b5cf12ca.pdfIn PDF document text
    • https://cdn.sqhk.co/vejanozugova/ajfxibj/21489012380.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383695/normal_5fedf2f376719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f9cae1636ca1.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/jagcwhe/bawabimubaloxewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5fe438c52b4a0.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/iivhade/chase_bliss_automatone_preamp_mkii_review.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/iealiiC/xbox_one_gaming_chair_amazon.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/d678af2c-9660-44db-99bb-9ccebf32305d/xixatevuramujekewub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a419eb25-3e49-447d-9ea3-42bdc78a1589/fidelis_essential_plan_income_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04fc62a-3b33-40a6-b05f-05d57aeb6f61/geo_book_3_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c1f515-daf7-4548-b805-bff78f051330/45614835908.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_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 4872 bytes
SHA-256: 94eeab723a1ac19a3173daca5afc15ef1e571833ecc8802c54a8147e7d24da4c
font_01_sfnt_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 12040 bytes
SHA-256: a02a8880f71defc7c2f43f374a136f68ecfeda0fcd7decc8464a069aeeaf0497

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