Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b83f30b2bdb3b74…

MALICIOUS

PDF

78.5 KB Created: 2021-04-29 23:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97754656d13b013b2e9cd4c849260350 SHA-1: 65c722d9a4d7d1607188675734966009226ad0ad SHA-256: 3b83f30b2bdb3b74205493f0629566996cef090af3f7ae157f91fff99ba0e4c6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. ClamAV detection and ML classification strongly indicate malicious intent. Although no scripts were directly extracted, the presence of external URIs suggests the document is designed to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=iso+9001+internal+auditor+training+cost
    • http://podarokinsta.site/hcf_and_lcm_using_venn_diagrams_worksheetvzutk.pdf
    • http://fomigiv.mypressonline.com/37447593569.pdf
    • http://introdom.ru/xebilujekerusudodokocr7bm.pdf
    • http://zuvels.xyz/disadvantages_of_hierarchical_database_management_system1krn2.pdf
    • https://cdn-cms.f-static.net/uploads/4481061/normal_602a161401941.pdf
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5ffc2f2d1e813.pdf
    • http://busawilapuguzas.iblogger.org/toefl_speaking_sample_test.pdf
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5fdd322d1c2c2.pdf
    • http://pepipejevu.iblogger.org/rekugozarijileder.pdf
    • http://gonifarej.mywebcommunity.org/pimupoberibemepabosipap.pdf
    • https://cdn-cms.f-static.net/uploads/4401983/normal_605caa04d7fad.pdf
    • https://cdn-cms.f-static.net/uploads/4479715/normal_604af728a2e20.pdf
    • http://nature-ital.space/42535020008f3eim.pdf
    • http://rogijowop.sportsontheweb.net/18807728894.pdf
    • http://gexafozo.22web.org/53383243430.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_7dbafdd0a24045578d3f68b0cd7ab3d2.pdf?index=true
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_8ab5ee955ada4c1499d862aa37622c8a.pdf?index=true
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_ca37b898f3b64aafa0a9383938a1c7e5.pdf?index=true
    • http://fulawumobolofog.epizy.com/pokegavisagevegipavenab.pdf
    • http://sosewovitifofus.epizy.com/understanding_business_valuation.pdf
    • https://be1b941d-c88c-475c-9260-a39c9d088d9d.filesusr.com/ugd/5c562d_9e17d4b63a804b5cbf42a5e7ae9abc6a.pdf?index=true
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_ca702579bcb946eea39382ff82ac0d7e.pdf?index=true
    • http://laxunuwozen.epizy.com/google_email_settings_for_android.pdf
    • http://nosofaxiwobud.epizy.com/ansi_c_balaguruswamy_7th_edition.pdf
    • http://waxaravibew.epizy.com/bosch_500_series_dishwasher_for_sale_near_me.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e611.bin
bff3f16c0eb419d0fe7f94b75828922a4348b033d23cdb96896b35559174e9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 5276 bytes
font_01_sfnt_off0000f802.bin
274f01f55d6d9fe63d74cdad114e0dd743cfa01fadfaf65815bdbf98796a4f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF802 11196 bytes
font_02_sfnt_off00011e2e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2E 4324 bytes

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