Malicious PDF — malware analysis report

Static analysis result for SHA-256 f735033c8b3de047…

MALICIOUS

PDF

79.4 KB Created: 2021-03-22 04:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21051ce8771ad9af9d0adac004c252f9 SHA-1: 7227601369694a71e79c7ebee6856a3ea236c297 SHA-256: f735033c8b3de0478030a239768de576852626ec44f0c58c42002d49d46f2165
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. The embedded URL, disguised as a tutorial, is a common lure for spearphishing attacks. Although no scripts were explicitly extracted, the PDF format and the nature of the detection suggest potential for embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=adobe+indesign+tutorial+in+urdu+pdf
    • https://static.s123-cdn-static.com/uploads/4384482/normal_5fff537c3bd41.pdf
    • https://toxupenowa.weebly.com/uploads/1/3/4/0/134042648/703393f40.pdf
    • https://static.s123-cdn-static.com/uploads/4370302/normal_5fc57c8d4fdc4.pdf
    • https://tojejalunegod.weebly.com/uploads/1/3/2/7/132710717/senekinixavi_dipateduwiput_muwil.pdf
    • https://nopirepogoduk.weebly.com/uploads/1/3/4/0/134095858/4785247.pdf
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/fajuzepifipen.pdf
    • http://trells.space/tevigororubewuduzigupipw2986.pdf
    • http://iuts.space/acustica_fisicaddejj.pdf
    • http://boforobevuziko.mywebcommunity.org/calculus_early_transcendentals_8th_edition_answer_key.pdf
    • http://nebo-baikala.ru/combining_like_terms_worksheet_6th_gradeyb4lm.pdf
    • https://cdn-cms.f-static.net/uploads/4488102/normal_602587d93b68a.pdf
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/jufefugixipabekit.pdf
    • http://arnautmebel.ru/15242909658tmwwi.pdf
    • https://cdn-cms.f-static.net/uploads/4473041/normal_603103ff4da33.pdf
    • http://jakartapro.xyz/martin_luther_king_jr_speech_youtubeofran.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kavibajegis.onlinewebshop.net/57499477417.pdf
    • https://s3.amazonaws.com/ximupuv/facebook_marketing_blueprint.pdf
    • http://sipanokule.onlinewebshop.net/16432663159.pdf
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_7d769c77f8e2469ab204e41f26c57abd.pdf?index=true
    • https://s3.amazonaws.com/tudawufed/47983281289.pdf
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_f92eb6ce8f8f460eb357f3beae45a982.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_off0000f86b.bin
d24adc858dd010e22803ce02a37d10ec4d05ede97ac06e5587ab4447b88f073c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 5336 bytes
font_01_sfnt_off00010a9e.bin
0cc1dcb9b36b183b979acec21fb4b1c6aec5b4e9c4a976623b2f7ae29d83b48a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9E 11072 bytes