Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2fbdf9881246de…

MALICIOUS

PDF

93.7 KB Created: 2021-04-13 11:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0f6845195516383292ee78b098c670c6 SHA-1: 74cc4e3fd688d5e797681dfeee83e73bb7bd2905 SHA-256: 2b2fbdf9881246ded0836713f42e6dce3dd4f085edb86752db17cd07b4061405
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://leonvi.ru/strik?utm_term=canon+580ex+ii+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/wuvotalek/Bgd86yU/kixekifaza.pdfIn PDF document text
    • http://com-servers.online/what_is_the_subtle_knifetcv0j.pdfIn PDF document text
    • https://nuzalegexokoz.weebly.com/uploads/1/3/0/8/130814177/5e3887.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/jeWu4vv/snowboard_master_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vatukaso/ieOvFh7/80502938314.pdfIn PDF document text
    • https://cdn.sqhk.co/xobadata/jU1oAoL/cash_money_records_former_artists.pdfIn PDF document text
    • https://baxufolodamiz.weebly.com/uploads/1/3/1/4/131408032/5566861.pdfIn PDF document text
    • http://pomirkapa.site/9712668842887pzr.pdfIn PDF document text
    • http://czecheducation.space/cazadores_de_sombras_y_subterraneosfxcr0.pdfIn PDF document text
    • http://giftcard-sale.store/44089171108iv429.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_cabf5a1da5fe4301bf8f625da449ca4a.pdf?index=trueIn PDF document text
    • http://jizekoliwivutu.rf.gd/active_listening_skills_psychology.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_3d9a19159f5c4ae0a1b7511916698705.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_2051b8c66f1e499fba16055cbb838e1d.pdf?index=trueIn PDF document text
    • http://xowomowipuzu.epizy.com/candidiase_em_homens.pdfIn PDF document text
    • https://331e17ce-4321-42a7-89aa-067eaa3daeeb.filesusr.com/ugd/6576ad_9d8491f7821a4981ac7a7510ef6e6c39.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_0ab5e81ecd5d4488a9d162b8f76b468e.pdf?index=trueIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_c80f68cfa6f8428a8168ed7affd53366.pdf?index=trueIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_9b4aadc5fc7f46f19597304b88c4d013.pdf?index=trueIn PDF document text
    • http://pubofemitepe.rf.gd/disneyland_california_park_map.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_4e194f0415f24ebe819b388571f5fff7.pdf?index=trueIn PDF document text
    • http://sewevikefusox.epizy.com/53157016686.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_off00012db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB9 5376 bytes
SHA-256: b722e188de53727c9ef598fee2388631396f33348548d4928c9afd1bad8b58a2
font_01_sfnt_off00013fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FEC 11636 bytes
SHA-256: 6ef3c9e21697f2339209254ccd25dfa08e7d706055582cec7547ae2d6f2676db