Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a387b71c780ad34…

MALICIOUS

PDF

176.6 KB Created: 2021-03-14 03:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7c4c4e8de68ceb0959fb19a8a6740004 SHA-1: 72e218e1e0fd309fb0e179bf41957a1d20df191f SHA-256: 0a387b71c780ad34139728819a4d05c94c98770501f86fc79db24ede8aefc8b2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for phishing or malware distribution. The embedded URL 'https://seumenha.ru/strik?utm_term=a+false+biblical+god+crossword' further supports this, pointing to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=a+false+biblical+god+crossword PDF link annotation
    • https://pepedojimu.weebly.com/uploads/1/3/1/0/131069997/zizati_xuwizuzuxakuji.pdfIn PDF document text
    • http://presalon.xyz/dofezawiboriwanamoe81qy.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/985589153702509u.pdfIn PDF document text
    • http://xudisoda.66ghz.com/guided_bus_route_tyldesley.pdfIn PDF document text
    • http://moscowflowers.shop/22236193475azuf3.pdfIn PDF document text
    • http://belldiscount.ru/rokobepiganavifbwyg8.pdfIn PDF document text
    • http://pedujagafena.22web.org/66197841708.pdfIn PDF document text
    • http://keksik24.ru/apprendre_anglais_facile_pour_debutant26oo6.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/5c671956e8.pdfIn PDF document text
    • https://nikudedixipapun.weebly.com/uploads/1/3/4/6/134692686/7851603.pdfIn PDF document text
    • http://prosucre.pro/gaxotitewomilurezanlcijr.pdfIn PDF document text
    • http://detonicro.website/peavey_bandit_112_scorpion_schematicla1gt.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/7a04d04.pdfIn PDF document text
    • https://sopebanodi.weebly.com/uploads/1/3/4/0/134017095/3175289.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/bluebeam_revu_alternative_for_ipad.pdfIn PDF document text
    • http://boxesobalano.rf.gd/shell_sort_algorithm_with_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e02f99-0db4-4cae-bd95-0f6f2ee4974d/gezizubenut.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/sentence_correction_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3287a6-d10d-428f-9881-124a5685b0f9/vumofexazuletejemar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d242c3-7a8b-46d8-812e-8df5efde8a5a/bavekemapidowofutujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee1bc26-18be-44e0-bc2b-8d1dcfa66e3a/when_will_the_next_wings_of_fire_book_14_come_out.pdfIn PDF document text
    • http://mowovojedux.epizy.com/13243763806.pdfIn PDF document text
    • http://solazagu.epizy.com/23393995214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2fc2f0-e839-4fc7-84f8-3968ffec7c3d/32317407828.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/netflix_stuck_on_waiting.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27A3B 5412 bytes
SHA-256: f34036752c4300f40abca467ba6fe17baae5e88e74306ebac592aeec80ac79e9
font_01_sfnt_off00028cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28CBD 11632 bytes
SHA-256: 1d7033600dded68adecdd3cf0998bb76148c7e309619fae839d3eda38519d944

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