Malicious PDF — malware analysis report

Static analysis result for SHA-256 af32be9f67d7858f…

MALICIOUS

PDF

75.5 KB Created: 2021-03-27 20:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a087ab85d305d5e0dd86d1cd29769ef4 SHA-1: e1588cd8efcf0a6f686cdc5b3f29b8c430fe97b0 SHA-256: af32be9f67d7858f3e1c1bb0c2c1abc3dd3cd2c35cc263fd9107b8f86663b17b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=busy+busy+video+song++mr+jatt
    • https://cdn-cms.f-static.net/uploads/4473656/normal_5fe6459033daf.pdf
    • https://static.s123-cdn-static.com/uploads/4461505/normal_6006fbd1e8e36.pdf
    • http://domensita.fun/mosel3hyrn.pdf
    • https://cdn-cms.f-static.net/uploads/4501193/normal_6026b27c9f696.pdf
    • http://mavpa.fun/gelapexobetoqzux.pdf
    • http://natnat.fun/95849332097xiy91.pdf
    • https://cdn-cms.f-static.net/uploads/4371005/normal_6049512c1ba7e.pdf
    • https://cdn-cms.f-static.net/uploads/4367914/normal_60369b57704a9.pdf
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5feb4abe2fb66.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ae974482-26b6-4c3f-af58-1c938002c49b/10372473860.pdf
    • https://uploads.strikinglycdn.com/files/d016a27a-5abd-4c5a-aceb-ae64ceaeabb3/danevugaxuz.pdf
    • http://devawuwu.rf.gd/dark_web_ios.pdf
    • http://zomusuxine.rf.gd/kuzavebosujadafubapu.pdf
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_509bc2a4867c4d9da94463398b19e876.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3fe0a523-a4f9-4c1b-943f-8164b5e5c564/what_can_i_take_to_put_me_in_a_good_mood.pdf
    • http://xivoxek.epizy.com/environment_and_ecology_mcq_for_upsc.pdf
    • https://uploads.strikinglycdn.com/files/5205c7e3-b2f7-487f-b331-1ee12de2392b/sudusenonipuxakuzulet.pdf
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_f3f5572223944c11a3bdf46157450d10.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e806.bin
0122fdfbf70fac0782262e1e55ffc200230e000f35555c019adc73956a6194f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 5540 bytes
font_01_sfnt_off0000fad5.bin
e3d990271fa0a1d56419725ba685d943a90f5303de428ba2eaf6c1640588bce9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 11180 bytes