Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f75e693c4ebae38…

MALICIOUS

PDF

80.2 KB Created: 2020-12-31 00:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6098f815c219e6a218fdd6a1926e893c SHA-1: ba2f89398e40aa09805b3ac4fbf492c378b02064 SHA-256: 4f75e693c4ebae387ee6f0767f9a4cbd6fe295cf539c792aef1fe4abbed35e13
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text suggesting it is a lure for an 'Edtpa task'. No scripts were extracted, but the presence of external URLs and the malware classification strongly indicate a phishing or credential harvesting attempt.

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
  • 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/123?utm_term=edtpa+task+1+context+for+learning+example PDF link annotation
    • https://cdn.sqhk.co/ranotigu/a9ihjie/taptap_heroes_mod_apk_latest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f9101e7a316b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5fe55804ef044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417309/normal_5fed02b87af66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_5f9725ee24b84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5f9226497257d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5fd29607c4003.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/67b95c17-8524-4b01-b9ff-adfa467562d6/21537998169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac02636-db01-4547-b614-5c5403213750/60575045134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ecb619f-1098-42fc-b1de-2d72b6548228/sodizud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1b9258-0be8-4015-a6e4-572cc94f2076/sigawegodagojisozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7501bf-e2d8-44b7-9503-e3063d42af69/todekuvulukofovunogogoxug.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_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 5616 bytes
SHA-256: bd0971519faf513a2ab6334c16e4af0391106fd83dd680129b2858ccd986c6ba
font_01_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 11256 bytes
SHA-256: 9786f733f3adc4a1b6223e64363597900b39524f99493b6db637ecf0acbe2650