Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0af5e8bc85c612…

MALICIOUS

PDF

74.8 KB Created: 2021-01-21 13:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 72e6555daffa2440f8285dc99aef61ec SHA-1: 2f53be59fee48dd28837c44a114815466348f2ec SHA-256: 1c0af5e8bc85c6124faa861fab1731a82e0614aee2904f0b99496c058f2fa2c9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to company registration.

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=company+registration+certificate+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464722/normal_5fa9259402bc9.pdfIn PDF document text
    • https://site-1195137.mozfiles.com/files/1195137/10th_standard_new_book_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452173/normal_5ff6a99c68915.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445114/normal_600907a247652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5faaffbb75ed6.pdfIn PDF document text
    • https://site-1168145.mozfiles.com/files/1168145/12254617973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423772/normal_5f9b53b587d81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fce0d14c139a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ffdd49d623a6.pdfIn PDF document text
    • https://site-1174959.mozfiles.com/files/1174959/geometry_dash_how_to_play_2__2_levels.pdfIn PDF document text
    • https://site-1179637.mozfiles.com/files/1179637/boss_tuner_tu-_80_manual.pdfIn PDF document text
    • https://site-1174433.mozfiles.com/files/1174433/sekelefixutasiwod.pdfIn PDF document text
    • https://site-1174481.mozfiles.com/files/1174481/alligation_math_problems_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/cisco_switch_sg350x_datasheet.pdfIn PDF document text
    • http://gisunomadipoxas.epizy.com/mandate_letter_sample.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_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 5340 bytes
SHA-256: 20e50cefa23479de88c92d578a47f872dcdaa4e10181c06d70f34b073a87f7fe
font_01_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10108 bytes
SHA-256: 453d3734d3ae1faa7bb23034afda33c432948d26c6306785e267ed6ec3ba5251