Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddf886bb100c032…

MALICIOUS

PDF

72.4 KB Created: 2021-03-30 10:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a4b6256c4766d5ff2bbf129233ec017 SHA-1: 1c97a826688640bb09e4a2875397d01da2965cb3 SHA-256: cddf886bb100c032c0f742ea7c56138892c655d909b4878a0c1163dbbc114a98
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to host a phishing or malware payload. The document body, though heavily obfuscated, appears to contain references to 'computational physics inc' and the wkhtmltopdf tool, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=computational+physics+inc
    • https://cdn-cms.f-static.net/uploads/4390637/normal_6056faa7d76c0.pdf
    • https://lurafavef.weebly.com/uploads/1/3/0/8/130813461/0ba882.pdf
    • https://cdn-cms.f-static.net/uploads/4387242/normal_600f2e0eee463.pdf
    • http://jipegifol.iblogger.org/30894101924.pdf
    • http://cashthe.ru/nidopawixosujid7go3q.pdf
    • http://reweder.site/how_to_donate_clothes_to_homelesskiioj.pdf
    • https://cdn-cms.f-static.net/uploads/4444104/normal_5fdaa97e9d439.pdf
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5ffe1c69d4744.pdf
    • https://static.s123-cdn-static.com/uploads/4409107/normal_5fefb29946636.pdf
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/6689072.pdf
    • http://lnstagram-helps-contact.com/why_did_my_shark_steam_mop_stopped_steaminggsch6.pdf
    • https://zisibunekotif.weebly.com/uploads/1/3/4/9/134902626/nawegujevibejarax.pdf
    • https://static.s123-cdn-static.com/uploads/4465565/normal_60084abd539eb.pdf
    • https://static.s123-cdn-static.com/uploads/4462350/normal_5ffdc48e09235.pdf
    • https://cdn-cms.f-static.net/uploads/4365567/normal_601a08df3020b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jasisogurajis.rf.gd/caida_de_tenochtitlan.pdf
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_afc188b79bd542cb8c7518eb6ccd401b.pdf?index=true
    • http://zukeligo.rf.gd/the_secret_life_of_the_american_teenager_season_3_episode_27.pdf
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_8d61da65067146df9f5e803414c6f1c0.pdf?index=true
    • http://lopumupukerodu.epizy.com/togadodabugonitanibazul.pdf
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_2450d0b5be7b47cdbce2099a1cd8a578.pdf?index=true
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_1de97d1912204a1ba166dd7c064b659f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d1.bin
063af4f6eae23320d80888bd9be9e6280af632f69a57539353fd234f15fdf81b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 4968 bytes
font_01_sfnt_off0000e38b.bin
e040bd86c95643e11c8f0e04fa7f0ca490be5db7e621163bf570d8b173698d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE38B 10288 bytes
font_02_sfnt_off0001066e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1066E 4324 bytes

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