Malicious PDF — malware analysis report

Static analysis result for SHA-256 442029ce1b4f2b3d…

MALICIOUS

PDF

87.5 KB Created: 2020-12-30 00:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8505d2d13c470fbdfa3ae3bd63250900 SHA-1: 7ef8534bf9d4106a026e098cc69e66bff642b577 SHA-256: 442029ce1b4f2b3da828c5a1b534fbefe0c7f4aead3860af4464b08256e4b7b8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains an embedded URI pointing to a suspicious domain. The PDF structure also shows signs of manipulation with duplicate object bodies. The primary attack pattern involves directing the user to a potentially malicious URL, likely for phishing or malware distribution.

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://traffnew.ru/123?utm_term=novelty+commercial+carpeting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5f95a72586e99.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/jhjGs9B/54942610045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_5fdfbba6b4de7.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/igMhchb/99850179369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f8d4c0351840.pdfIn PDF document text
    • https://cdn.sqhk.co/bewiviki/gKJiclv/regajowatipavuvoligi.pdfIn PDF document text
    • https://cdn.sqhk.co/gerukoso/cgcCTIU/nufotewuzinubixafodisupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499673/normal_5fb77d40352ee.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/ifHJvgd/heritage_auctions_action_comics_1.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/shdhdih/starfall_learn_to_read_all_about_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fa909554b880.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/jhieIgd/31910265977.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/suxuzubojut/guidelines_for_blood_pressure_management.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/manual_reader_crossword_puzzle_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/70635010327.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_off00011226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11226 5204 bytes
SHA-256: b94c9ca02808c647b4945447fd4c9ce09ab786519258854dc2678b06275f1634
font_01_sfnt_off000123db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DB 14632 bytes
SHA-256: ad2e402a4b8b98a55fad0e9a27b42f42c649fa23d553bc781810c2932060d29e