Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5dd5331dbec091…

MALICIOUS

PDF

100.5 KB Created: 2020-11-19 00:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bb936e2df6a5e95bc82009a17054a1c2 SHA-1: 3d9971c4f7f4255c7b2263c17c64e798e2fd6e0a SHA-256: fc5dd5331dbec091c08f36e33f0a6f17611d271c4794c9db9e04e1471baaaf0a
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 as malicious by a ML classifier and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though partially corrupted, suggests a lure related to 'carti download psihologie'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=carti+download+psihologie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5f995b0fc6549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_5fa33cf09cc6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fb4767d240c2.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/fasanag/84632331607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95effb82-8ce9-495f-947d-f0025c42f205/78802134600.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/74726932878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf87fff6-ccdf-4326-81c0-1c0a0a2afb6a/tetejesoxabofusafuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c458fb6d-cfe2-45ae-ad1b-2f2e8ace7538/puvakiwupinekeduduwagup.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/dapebifibunamur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a72b6d-6494-48cd-b719-7f8320aaf629/radibilov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c439ecf1-0317-40c8-a9b6-b214910477e7/kenwood_dnx692_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/abecedario_para_nios_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/xidikazijezawamuvev.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/79415124071.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B1 5124 bytes
SHA-256: dee66e4db787243633465566439eafa7925afb621118243af4e0668cfd2f1fe6
font_01_sfnt_off00013a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A29 12792 bytes
SHA-256: 3d0e88a00362b44ce1e7dc456ed4ff3303a6525a7abd323433c564e38900a513
font_02_sfnt_off000161d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161D7 16076 bytes
SHA-256: bfd5fcdb7495bed175e4f51938194e2ecb7e505d90535bc2124716332a04a4ab
font_03_sfnt_off00017680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17680 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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