Malicious PDF — malware analysis report

Static analysis result for SHA-256 49933564c69b0487…

MALICIOUS

PDF

72.5 KB Created: 2021-03-24 08:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35f4ed2106e6e9f2a338c40b17c93877 SHA-1: b1e17212726c59631f93d446ec90c8b00aa5b791 SHA-256: 49933564c69b04879810da849587c77a8dfa3512d2f80c5f29cdc00b8dec95b0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content, likely through a social engineering pretext related to psychological assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=handbook+of+psychological+assessment+fifth+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fd1c3376a0f7.pdf
    • https://cdn-cms.f-static.net/uploads/4413719/normal_601744d4df6f3.pdf
    • http://hotloveme.online/546379524137m01p.pdf
    • https://cdn-cms.f-static.net/uploads/4419645/normal_5fdc044867f50.pdf
    • https://cdn-cms.f-static.net/uploads/4456399/normal_5fea1c50d4657.pdf
    • https://cdn.sqhk.co/rozopebak/fUgiHjg/rise_up_hamilton.pdf
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fd7cdf3d6f63.pdf
    • https://cdn-cms.f-static.net/uploads/4367297/normal_60496837483a6.pdf
    • http://copyright-securityx.com/124393878344tydj.pdf
    • https://cdn.sqhk.co/jutusaxibu/4fEIikY/26087462891.pdf
    • https://cdn-cms.f-static.net/uploads/4382772/normal_601238d52ee0f.pdf
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5fc8d92b05f28.pdf
    • https://cdn.sqhk.co/fukaxaxod/qhdAjjj/try_not_to_laugh_challenge_super_hard_clean.pdf
    • https://cdn-cms.f-static.net/uploads/4452152/normal_5fe8eb2b41c82.pdf
    • http://kejumazinanu.mywebcommunity.org/mirabawaredid.pdf
    • http://prodson.fun/why_does_my_vizio_sound_keep_turning_offisoye.pdf
    • https://cdn-cms.f-static.net/uploads/4464542/normal_6056df78a1074.pdf
    • https://cdn-cms.f-static.net/uploads/4376875/normal_60438b2e62b27.pdf
    • https://cdn.sqhk.co/tujuvemevo/hehfhha/94922429816.pdf
    • https://cdn-cms.f-static.net/uploads/4425726/normal_6033472dae4b1.pdf
    • http://waystep.site/xumoxesasuzawujegovokeki5azkf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ledufowi.myartsonline.com/market_leader_business_english_course_book.pdf
    • http://tobikinos.onlinewebshop.net/88653654160.pdf
    • 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_off0000de3c.bin
cc852c65e5e09bf22e84e9f288e1325de22a386ea8b85f752c1facd70c94418b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 5740 bytes
font_01_sfnt_off0000f1a7.bin
d762a96c5ca1232c4b5bbd4f937b1946101cf2a8ebd2de35aef7d32529a4be0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 10168 bytes

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