Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4f061bf2d6b2f5…

MALICIOUS

PDF

88.2 KB Created: 2020-12-17 00:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 51655cd70942af1b726fd8603039d4f2 SHA-1: c70336c8db8802b1d3af17844d445ffe0070b3d1 SHA-256: ee4f061bf2d6b2f50f6b18609666a84542937bf89256af9014ac3a0405f7c6c4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, traffset.ru, which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to digestive systems of ruminants, 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
  • 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://traffset.ru/aws?utm_term=l%2527+appareil+digestif+des+ruminants+pdf PDF link annotation
    • 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/vaxebisapesi/mlab_android_tv_box_uhd_4k.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/7080931293.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/function_machine_math_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/13400152742.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/one_less_worksheet_kindergarten.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e08512facd59ceacd9cd/t/5fc36bb2173fb5383b0f027b/1606642614830/blizzard_zero_g_95_2021.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce016f4a55824081a526aa/t/5fd68cdf13a48350e81906d5/1607896287285/xuwexewenidabufefobugur.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/66475375140.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b405161f8068bed02ab5/t/5fccba879aa2de0c6490305a/1607252615606/b-_52_bomber_shot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57e136609fd0ee7b098e0/t/5fc719b34f9413233b19f7fa/1606883763918/superstar_makeup_salon_girl_dress_up_games.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/pitadulakuvafinumetu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e44e92c50b1a1e7784dc/t/5fcd98d0c836a917f927cd3c/1607309520237/19654308441.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/joiner_transformation_in_informatica_interview_questions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01ccfc14dfd36feed28e9/t/5fc38c157acac6192a2e208e/1606650923644/sureperesox.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_off00010e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E09 5108 bytes
SHA-256: 31d316ce78afdeb1e26275ce0d329aa0b3f21461eea9988c86841635a30a2932
font_01_sfnt_off00011f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F51 12212 bytes
SHA-256: 51680922e9ef707343792d80b50696e48d5a867edc052da89e3366d742cba0d1
font_02_sfnt_off0001454e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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