Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0e5fdadd7f5c4f…

MALICIOUS

PDF

78.2 KB Created: 2020-12-30 19:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a00add666784caa3d45cd2faf7d271 SHA-1: 7e0040cdcdc29ede52390de4662b552ce0a1eab2 SHA-256: 8e0e5fdadd7f5c4f65417d00c6456fd1ba6871c6a737d2aa7eb50324a9ca001d
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 URI pointing to 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a malicious site.

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://trafffe.ru/123?utm_term=hello+kitty+check+book+covers
    • https://cdn.sqhk.co/moviferu/ZPhhqEQ/the_factory_jersey_city_owner.pdf
    • https://cdn.sqhk.co/mezutorixo/B1jea7C/stick_fight_warrior_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5fe9c8d2b1c15.pdf
    • https://cdn-cms.f-static.net/uploads/4459805/normal_5fab5e27958a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wapabefizosumi/78234709573.pdf
    • https://uploads.strikinglycdn.com/files/6f749c92-6f55-4e5e-8d9f-84ddc2cdca16/chicken_65_recipe_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/378787e5-1893-4db7-b31c-0f84f9ba17bf/saniruz.pdf
    • https://s3.amazonaws.com/zalomi/kannada_christian_video_songs.pdf
    • https://uploads.strikinglycdn.com/files/44fa6346-23eb-4829-96cf-5d1a4363a749/homebrew_9_1_balun.pdf
    • https://s3.amazonaws.com/gedesisumi/30887027504.pdf
    • https://s3.amazonaws.com/kitakilesa/17874502209.pdf
    • https://uploads.strikinglycdn.com/files/f50476d3-dc6e-4205-986a-e605da8158c8/tommy_bahama_luggage_mojito.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81e.bin
7f38d1259ef49ac00868a30ecd92efecbfd1c533d7f64be97381d5e7ed291bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 5004 bytes
font_01_sfnt_off00010927.bin
02b0f8f77491799734d0d335e0bcf8a195adfe0055ce54e4ba175ab394f7e44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 10376 bytes

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