Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42e341d8ea0efb1…

MALICIOUS

PDF

80.0 KB Created: 2021-03-17 16:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62b7cf63f50e91ee854abcb8e61ac598 SHA-1: 3031e396e5cb113ea787f33ca5884c31f25c9ca7 SHA-256: c42e341d8ea0efb1552029f567c3891bc25fc5b25dee07dfbd45d81c6eefdf0b
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 high risk score. It contains an embedded URI pointing to 'nipisod.ru' which is likely part of a phishing or malware distribution scheme. The presence of multiple unknown URLs suggests an attempt to redirect the user to malicious content, possibly disguised as a PDF document.

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://nipisod.ru/wix?keyword=java+puzzlers+pdf
    • https://cdn.sqhk.co/todiwapubu/jjYHbgd/wipukebapi.pdf
    • http://relax35.ru/husqvarna_7021p_blade_lowescdc0z.pdf
    • http://brettlockhart.com/6764268007cbs3h.pdf
    • http://trenolgia.buzz/59936046920w1n12.pdf
    • https://cdn-cms.f-static.net/uploads/4487416/normal_603126348f780.pdf
    • http://nagonakog.22web.org/69006801049.pdf
    • http://esportzmlevent.com/seteselotebcaqz.pdf
    • https://cdn-cms.f-static.net/uploads/4495240/normal_603a9c6d96a17.pdf
    • https://cdn-cms.f-static.net/uploads/4448540/normal_602777889fdfa.pdf
    • https://cdn.sqhk.co/tawavumazo/ighGMhg/dukibozevozesuvemi.pdf
    • http://activa-fb.com/social_media_marketing_agency_business_plany210u.pdf
    • https://static.s123-cdn-static.com/uploads/4451561/normal_6008ce4d493de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a05b8b4-2664-4558-a8ba-fcdf9b603ac6/harry_potter_book_1_chapter_5_quiz.pdf
    • https://uploads.strikinglycdn.com/files/6805ea08-0beb-4bb6-ad7c-c23dd274c48e/sony_shake_33_for_sale_uk.pdf
    • https://uploads.strikinglycdn.com/files/06bdb609-598e-4eda-b176-b8bdb9cf7298/the_screwtape_letters_1942.pdf
    • http://laxiruzeremifam.rf.gd/69766291045.pdf
    • https://uploads.strikinglycdn.com/files/6597e856-d4be-47f6-9691-74b41cd07eda/wibewetupalituzoron.pdf
    • https://s3.amazonaws.com/bikikanafopavu/rogewoxojaputusewujefubuw.pdf
    • https://s3.amazonaws.com/wemofodi/best_moultrie_game_camera_2020.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_off0000fa11.bin
f8ce9110eebaa6f812106cdb760a229f6a5c800066c16f41cbce39b74f74c2c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 5132 bytes
font_01_sfnt_off00010baa.bin
dd83e7cc9e825c23e2ab1c0fcdd132c0affe7c2d2eb0d3fec85fd1352f3b244a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 11856 bytes