Malicious PDF — malware analysis report

Static analysis result for SHA-256 654a4c6878d92e93…

MALICIOUS

PDF

80.2 KB Created: 2021-04-01 23:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cd8d4a3f69a615aa554c2ef5bb3b883 SHA-1: 248e14ce0c8b0d31f5f675952f426d347747bc89 SHA-256: 654a4c6878d92e93f54fa663d5bd640c3b205d55cce4f691c1775380d99ce9d4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains multiple embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'half hourly schedule template' and 'wkhtmltopdf', indicating a lure to disguise the malicious intent. No scripts were extracted, but the presence of external URIs strongly suggests a phishing or credential harvesting 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://lozipotod.ru/123?utm_term=half+hourly+schedule+template
    • http://tosefabebiribow.scienceontheweb.net/16227335959.pdf
    • http://gubixazolela.sportsontheweb.net/43578319809.pdf
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5ff1ebaa53206.pdf
    • http://fukiwurezopukof.mywebcommunity.org/sherlock_holmes_full_movie_download_in_hindi_dubbed_300mb.pdf
    • http://xupokaxe.medianewsonline.com/65813698627.pdf
    • https://jijixedo.weebly.com/uploads/1/3/1/3/131398351/6581465.pdf
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/xedatosegizi.pdf
    • https://static.s123-cdn-static.com/uploads/4417656/normal_60049afe06af0.pdf
    • https://zemijawa.weebly.com/uploads/1/3/1/0/131070152/zusisazofuf-robabi-supujivulor-mijuliwuwedidaz.pdf
    • https://cdn-cms.f-static.net/uploads/4481056/normal_601b46a3a0da5.pdf
    • https://cdn.sqhk.co/vegedusovo/iihMQhd/calcutta_university_syllabus_2019.pdf
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/wojasudotisuduwezis.pdf
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/2cb35.pdf
    • https://cdn.sqhk.co/kekotenonaxu/gfeoDbB/towakumepin.pdf
    • https://cdn.sqhk.co/wujakegu/e2Mjijj/68123466080.pdf
    • https://sekagerufelijet.weebly.com/uploads/1/3/5/9/135965199/231038.pdf
    • https://cdn.sqhk.co/xelalizogim/Bjagdhf/xogexokijugobexedili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1057c712-043f-4797-8195-78c429cab811/star_trek_discovery_season_3_episode_9_release_date_netflix.pdf
    • https://uploads.strikinglycdn.com/files/b4ca1b16-37ec-41da-b96f-f40a950f04af/what_is_local_culture.pdf
    • http://sipanokule.onlinewebshop.net/kung_fu_panda_2_cast_imdb.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_off0000fbb8.bin
aef0dad11f869da1862bd7f518c3aa7612dca3924b38673c16d00c3240897c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 5456 bytes
font_01_sfnt_off00010e2a.bin
80fb256c4f7d0e919f6d7f68bef2a3aae516178d4850986a283ed7ccd4b28e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 10964 bytes

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