Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc7e91b238a05e3…

MALICIOUS

PDF

152.2 KB Created: 2021-05-21 10:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2059788432b926f7f2950a76bdcb7c5e SHA-1: 94cc56a8bf5d47e002ef8919c42f893d6fc73407 SHA-256: 5bc7e91b238a05e31f004029864b76e1270bbcd349831deb24f40e3f6fa27cc0
126 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 heuristics indicating it's a link farm on disposable hosting. The embedded URL `https://lozipotod.ru/strik?utm_term=how+to+speak+how+to+listen+adler+pdf` is a primary indicator of malicious intent, likely leading to a phishing or malware download site. No scripts were extracted, but the PDF structure and external URL suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://lozipotod.ru/strik?utm_term=how+to+speak+how+to+listen+adler+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382193/normal_5fe481f700f14.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/7b19ca1c3.pdfIn PDF document text
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/5643193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_60332584e0a3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_602945531b984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_6066f93dde2d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_6026aac42c709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_604a403366740.pdfIn PDF document text
    • https://fakebomazeb.weebly.com/uploads/1/3/1/4/131453402/2020072.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/saxefun_womefojepi_wewolodiwe_todelegibam.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/1962449.pdfIn PDF document text
    • https://patawera.weebly.com/uploads/1/3/4/1/134131312/e80eef8.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/187706c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_60523be9af297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465398/normal_5ff1f58371273.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/3939155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_6040011f9d626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0f5cc2-f625-462e-9cbf-f37fc75cbfd0/what_happens_with_high_blood_pressure_in_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/97297591405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ee3005-5a97-43ad-9fb0-cdc25ee2537d/95372352658.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/xikizap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ea723f-a3bf-46d8-8d77-a23a3b3eb04c/the_last_ever_after_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f68cb1b-2e17-45ca-9866-26470ee1182c/dapple_dachshund_puppies_for_sale_southern_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a055e2c7-d031-4373-af5d-b458a85e5e9f/the_tale_of_peter_rabbit_and_benjamin_bunny_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/gukiwumijuxivitig.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ec40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC40 5488 bytes
SHA-256: 5b16fcf8ff474f0339a8a526d10a5c66195a2e4c6029d1cbf5be07ba810eeaaa
font_01_sfnt_off0001ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF24 5248 bytes
SHA-256: 3bc6e7f1f7d98875d080b3a55c1ef5dec6cf4d2612a31d9c70c6cf8301a45a21
font_02_sfnt_off00021105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21105 13328 bytes
SHA-256: 0fe8f5941df7d123f05431feb40602a8aceb94983603bf5cda655648f36defb5
font_03_sfnt_off00023cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23CDC 16132 bytes
SHA-256: 0845746d8e0f76c2c57e53a5d0c2d2ba36ed31c4724e2802406f297ba1795667

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