Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a27d044a92b320…

MALICIOUS

PDF

76.5 KB Created: 2021-01-03 05:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33b65ff05d44a25aeb8ef708640bec84 SHA-1: efc02b93d151982594b66510e5d2cee3ea415f44 SHA-256: 39a27d044a92b3200f3bcc1731380a40080d411c834e0aec1f2ca8eeb56e4b37
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, trafftec.ru. ClamAV detection and ML classification strongly indicate maliciousness, specifically identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'definitions of sociology of education pdf', likely intended to trick users into visiting the malicious URL.

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=definitions+of+sociology+of+education+pdf
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f86f9b542943.pdf
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5f910b9833480.pdf
    • https://static.s123-cdn-static.com/uploads/4452862/normal_5ff09af5c715c.pdf
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5fb8d3f301df1.pdf
    • https://cdn.sqhk.co/larovejadeb/hehbhgt/coffin_style_nails_medium_length.pdf
    • https://cdn-cms.f-static.net/uploads/4482228/normal_5fd1945b1e7aa.pdf
    • https://cdn-cms.f-static.net/uploads/4446499/normal_5f9ee90f3cb36.pdf
    • https://cdn-cms.f-static.net/uploads/4476569/normal_5fb3ffa2dde15.pdf
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5f9b34fd491e2.pdf
    • https://cdn-cms.f-static.net/uploads/4393890/normal_5f9ae6327c17d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e2215887-9194-4cc7-b1cd-b8b1f1973885/oraciones_con_possessive_adjectives.pdf
    • https://s3.amazonaws.com/megodipewukitoj/65082033451.pdf
    • https://s3.amazonaws.com/juduk/tv_tropes_dexter_characters.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_off0000ec14.bin
049b11d24bc92bac8d52b9b5e143098463175f22a3cfe2c06f7880e05801f120		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 5328 bytes
font_01_sfnt_off0000fe5e.bin
96017a5e4d905b9bfd753a399f354eb1f1f34f3f21d442d1ab732f5b6b12e12f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5E 11260 bytes

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