Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb12ffc53cf46108…

MALICIOUS

PDF

82.5 KB Created: 2021-03-10 09:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a1312e3fc90b7aa3ea3ac2c16a528b26 SHA-1: e58fa35be5aad93d50103a04f62d2c9b0c9c3a07 SHA-256: eb12ffc53cf46108641379e1d0c65f44245a945aa582292542a1862ee5a01a61
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, with a specific detection of Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/strik?utm_term=currency+wars+goodreads PDF link annotation
    • http://jedomagisuw.getenjoyment.net/how_to_unmarry_livewire_ts.pdfIn PDF document text
    • http://thedefenseforge.com/86823506691jm00q.pdfIn PDF document text
    • https://sikupawabur.weebly.com/uploads/1/3/4/6/134624396/4677a458.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/600373029.pdfIn PDF document text
    • https://gapikedezasede.weebly.com/uploads/1/3/1/4/131438622/nulinonavuwu.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/restaurant_dress_code_policy.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/how_many_dunkin_donuts_in_boston.pdfIn PDF document text
    • https://wosixuluwur.weebly.com/uploads/1/3/1/0/131071196/3acac6519.pdfIn PDF document text
    • http://plsale.pro/9854212749gw5av.pdfIn PDF document text
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/keviselef.pdfIn PDF document text
    • http://wisecreditscore.info/20002048645r4vku.pdfIn PDF document text
    • http://bobr.space/vision_ias_current_affairs_december_2018_downloadma50e.pdfIn PDF document text
    • http://priz24.site/mejunenulyur1r.pdfIn PDF document text
    • https://vajilitoseg.weebly.com/uploads/1/3/1/4/131437648/8e024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b4971d08-fc67-4f68-9bfb-20d11a039dfe.filesusr.com/ugd/a9248e_ce16ace7ba60469d8c6e2c45df06aff7.pdf?index=trueIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_f671bf7a1fb0495a8deddae68938bb1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1f0942-0121-46e1-835e-776665842c1b/media_relations_definition_and_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7800f73-aa21-4693-ada1-0d1daf7fb6c7/is_january_a_good_time_to_go_to_walt_disney_world.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_2e1999fc016442de818ee53767e6d282.pdf?index=trueIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_a215cd136fcd4b36b6c2727c305401e9.pdf?index=trueIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_6b990249b01644ea925314a0eb614c62.pdf?index=trueIn PDF document text
    • http://valupakukav.myartsonline.com/87541997312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5943b496-941a-4d40-a298-e66365e7b0b9/bivimikagegufosave.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_dbc777c2deef407c85aeaf92858164ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4fa1c15-b2ae-40b8-b419-e5e0dbf38dca/77184854542.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_993dd0ddb71d49b9b463d3ba3d2f19a8.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_cc96a2a3e41c4593984af3d5a78f9f82.pdf?index=trueIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_13dde53778cd4fe9bdbe9c963b74ad77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f410a4-fe1f-4ff4-85bb-f05a39ff4805/85009367897.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_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 5172 bytes
SHA-256: ad50581deb16f56b5d54861dd9c97488f75f9072185fbec6c13e31e479e60ed5
font_01_sfnt_off0001150f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150F 11488 bytes
SHA-256: 8fb780a5bbea78fca95f34de7b23e78d96897099e6927244d399cd741f50bd25

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