Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e228cc4e9ea617…

MALICIOUS

PDF

75.9 KB Created: 2021-01-05 04:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 993f1b346857e6f4228a8e3db68336dc SHA-1: 9ea30e1a91a214382c60b2fb867fd7f5f76bfe83 SHA-256: c2e228cc4e9ea6171cc496d42c9cd363d5ee28bd2d9e9f74fd5476ee25514116
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 detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an 'annual report'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=essel+group+annual+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459791/normal_5fef9aa90bee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446026/normal_5fa2b83e2e07c.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/ZvjigeW/cosmic_wars_the_galactic_battle.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://uploads.strikinglycdn.com/files/0599dc8a-5d68-45a7-b298-5b5e17e823af/the_laws_of_the_spirit_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9148ab1-2526-4015-b482-2116621295bf/mathematical_interest_theory_vaaler.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/pulokulenuxagunebewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669d981e-b027-4e3f-a5c3-aaab7839a93c/gilbert_strang_introduo_a_lgebra.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/unlawful_detainer_answer_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca8c204-4bc8-436f-97a7-8ee5f5004fe1/protractor_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958f296b-040b-4143-ae6c-544884270d7f/24388443280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318daf6b-6ac5-4c79-b50b-6ecd3697c73d/power_band_pokemon_sword.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_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 4780 bytes
SHA-256: 16079e3fe460afb494c83ebf835fea1ff71d7ae30983864dd131e20c345238dc
font_01_sfnt_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 11032 bytes
SHA-256: fc40bff3d2331c8077c27427a77555a99e12a1c4c4d7dffbba6810d7df429d45
font_02_sfnt_off000114a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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