Malicious PDF — malware analysis report

Static analysis result for SHA-256 82398d2257b13afe…

MALICIOUS

PDF

73.8 KB Created: 2021-03-29 02:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 578624c6bb45a285f1851afdacfd2ceb SHA-1: bc5fa11f5e9d597eda15a988d88a8c00440fa525 SHA-256: 82398d2257b13afe403128ee5c0b2720107b314eff38798dc91efdad8552f46d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external links, with one prominent URL, 'https://xezojetit.ru/award?keyword=example+of+rationale+in+research+proposal+pdf', suggesting a phishing or malware distribution lure. The presence of embedded links and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/award?keyword=example+of+rationale+in+research+proposal+pdf
    • https://cdn.sqhk.co/zexukobesu/Cc2idii/4491591113.pdf
    • http://palikexifumalam.mywebcommunity.org/convert_ft3_to_m3_gas.pdf
    • http://mavaxur.mywebcommunity.org/penatalaksanaan_fisioterapi_pada_penyakit_jantung_koroner.pdf
    • https://cdn.sqhk.co/mujejadalale/eISUgjg/putelepuzer.pdf
    • http://sunakijabe.sportsontheweb.net/falepezilirawiginik.pdf
    • http://gapilojazixo.getenjoyment.net/35112777970.pdf
    • http://nibakelenixezas.getenjoyment.net/project_administrator_interview_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d97e6551-c893-4462-be55-10bce1f30378/how_long_was_the_first_marathon.pdf
    • https://uploads.strikinglycdn.com/files/cbc72649-10f3-4f6a-8d3c-815a55e30fce/35542883264.pdf
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_d8b2a6e8d9c34c2d9fa46d5ce30e7fd9.pdf?index=true
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_e78aa086cb834ce39ed343d9f1ec802a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7b2435df-a497-432f-8b65-d5b17de97e0a/mezufopobizivigawe.pdf
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_8b2f8be9040b45e1b60cc4b71713c6bf.pdf?index=true
    • http://gagugitebuf.atwebpages.com/que_es_contexto_historico.pdf
    • https://uploads.strikinglycdn.com/files/d8837686-bf57-4dde-8451-b4437032ef5f/18175947886.pdf
    • https://uploads.strikinglycdn.com/files/b6b239e8-f992-47cd-b2ce-cfec665e3ef3/polk_audio_pswi_8m_wireless_subwoofer_setup.pdf
    • https://d0f5cf02-e55f-42e7-ba97-8a4d5a2b8368.filesusr.com/ugd/7f59a0_2fc48fb5526045e8ac0ac8b29eaa7030.pdf?index=true
    • http://bugazepoja.onlinewebshop.net/29216739089.pdf
    • https://uploads.strikinglycdn.com/files/fa374588-3c33-4ff6-acc6-c5c0df188dfd/why_does_my_pool_heater_keep_shutting_off.pdf
    • http://vovojoj.atwebpages.com/abu_garcia_silver_max_20_review.pdf
    • https://uploads.strikinglycdn.com/files/19426ff8-5d19-442e-a1e3-e3cc805c9388/98620881245.pdf
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_a09290a243cb4a848919e11da5f27ecb.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_off0000e3e4.bin
47705459cd83f0a6c902ec2910432886e8b7ce39460671d39eb7f9d87a0fdb63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 5420 bytes
font_01_sfnt_off0000f62e.bin
e326e3629536de5052016de6959dafd4619224ceb597f2144d19761b4626619c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 10524 bytes

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