Malicious PDF — malware analysis report

Static analysis result for SHA-256 623c64c49ddf4d36…

MALICIOUS

PDF

71.4 KB Created: 2021-01-06 07:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f7727eafa0010271d5a6ab3399a185e8 SHA-1: 96619e70ad6328644126a66fbf85556872d9a103 SHA-256: 623c64c49ddf4d36f0293bf935e2d561f2f652ba0afc8fa732147a5012e38f11
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely a malicious domain used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Avengers theme song sheet music guitar'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=avengers+theme+song+sheet+music+guitar PDF link annotation
    • https://cdn.sqhk.co/girewobo/gegcEt0/parrot_talking_about_squirrels_outside.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/VRlzdW2/piwigad.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/fuwenoxuzasila/chrono_trigger_ps1_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/wagapiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147cabf5-87fe-4e35-a31c-e4e69e8cd782/basic_economic_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a430ad7a-a6a9-4210-9226-58211716683f/brain_training_for_dogs_adrienne_farricelli_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74045621-cdb0-4ea9-afe3-79e249a3fbcf/vonagu.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/mowedibukegorekedufagasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424ddd06-0c8f-4bf1-866d-8cf19d3ffecd/lavar.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/buell_xb9_performance_upgrades.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/27024020678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a522ebe-10d5-4c0e-8784-3de0808df97e/duxinenilanowosa.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/nuwolasogaborufinigixaja.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_off0000cb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB90 5112 bytes
SHA-256: d062512a3e560457864a4b5a51147875dad0d707e3aa7c499b9a672b1389de05
font_01_sfnt_off0000dcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 11112 bytes
SHA-256: 693b704f64408ca2cbe00791ed29dfe1276ac17c5a2d2f3cc22ee64d6af240c5
font_02_sfnt_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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