Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ca8b0166c1210d…

MALICIOUS

PDF

76.1 KB Created: 2021-03-21 05:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a7f30e8fd7e35d18f1935b3131f16a8 SHA-1: 23366977769ffa3da6ffe214fb728591dc74d608 SHA-256: c4ca8b0166c1210d66b12d62b7a2df1205846b6a7c36fd44128255e37ab86b19
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier assigned a high probability of maliciousness. It contains an embedded URL that leads to a suspicious domain, likely intended to host malicious content or phishing pages. Although the document body is heavily obfuscated, the presence of the external URI and the overall detection profile strongly suggest a phishing or malware distribution attempt.

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://ponafet.ru/wix?keyword=los+angeles+zoning+manual
    • http://pegejoruvufiron.sportsontheweb.net/reglas_del_contrapunto_musical.pdf
    • http://fodefon.getenjoyment.net/feleladukug.pdf
    • http://xabibumat.iblogger.org/how_do_you_know_if_your_dachshund_is_a_mini.pdf
    • https://cdn.sqhk.co/mewowoji/egjgdg4/your_guide_tv_brisbane.pdf
    • https://cdn.sqhk.co/bisidilit/RnGjanW/fox_sports_live_scores_boxing.pdf
    • http://ziwusis.getenjoyment.net/presto_cool_daddy_deep_fryer_basket.pdf
    • https://cdn.sqhk.co/tamejenonisi/chd8q8H/13593828892.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ba96b6e3-a017-41c5-b2f3-7216d64b1adc/63558045499.pdf
    • http://genurenifu.rf.gd/asuran_bgm_mp4.pdf
    • http://kepofif.onlinewebshop.net/34033446565.pdf
    • http://winovonisalupib.rf.gd/14284541958.pdf
    • https://uploads.strikinglycdn.com/files/a13d93be-b1a0-4bec-b1b0-cd703d9a95ff/wenuwanabirixuguxelex.pdf
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_025380aa4a834913aab1d7f17aca19fa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/286b1c06-b668-4c1f-929c-41c56b46798f/velukarokutopad.pdf
    • https://uploads.strikinglycdn.com/files/0f77b98b-38ac-4be4-b422-3b7cba1532ce/70503268180.pdf
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_e948a430b8d944858519327d2a522599.pdf?index=true
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_57649921bdc14cb08afb6b193eae90cc.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_off0000ecb0.bin
e283a1c9db0421653de783accff5195df0994cf3c63334613c5bd5287a3f8a60
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 4900 bytes
font_01_sfnt_off0000fd58.bin
7698025b2ae188ad5e7825c2df2e0c128b44b2f3b4138bbc8ec5bc9d4be3f6f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD58 11180 bytes