Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e90af7f39427b1…

MALICIOUS

PDF

75.6 KB Created: 2021-03-08 08:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b3c833d685a64ec66825b7b6e70889dc SHA-1: 2830703f3d41ae1f040bd6f84758c57452c79869 SHA-256: b0e90af7f39427b1896fd278c5c7195fb7e68bf674a65e7e416d74e1799a2d53
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 0.9998

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://jumiwimov.ru/strik?utm_term=lochinvar+water+heater+reviews PDF link annotation
    • https://cdn.sqhk.co/sifajoxojif/hdprwa0/motorola_razr_v4.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/rdHeiaC/gosetesivurugurazim.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/positive_and_negative_punishment_psychology_definition.pdfIn PDF document text
    • https://japosazononugad.weebly.com/uploads/1/3/4/5/134583509/xasoxezof_wawuvipag_gexig.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/vajanabenatex.pdfIn PDF document text
    • https://xofilovinavi.weebly.com/uploads/1/3/1/3/131379248/larejev_dizokakexise_xesesezen.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/frieFxp/jigadejejotaxo.pdfIn PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/5134741.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/53803750279.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/hjeWCha/rovebelowomatulu.pdfIn PDF document text
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/wovanuwas_gipolelewodevas_bunup.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/ruzebimiwikej.pdfIn PDF document text
    • https://wezisaveveto.weebly.com/uploads/1/3/3/9/133999444/422c2fa76a972d1.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/8799113.pdfIn PDF document text
    • https://gagujaxerubu.weebly.com/uploads/1/3/5/9/135976614/bakukepag-nazivumufu-jepodepulezem-zanit.pdfIn PDF document text
    • https://sujarusokebukok.weebly.com/uploads/1/3/1/4/131437349/7271724.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/suvubedapis-levitiwiruxi.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/dufekifaral/define_the_term_platform_independent.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/vivah_video_song_bestwap.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_off0000eb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB91 4948 bytes
SHA-256: 5f60262f69da319c67fc98907fee8080e11f643b4b6841c5708963a470b3db92
font_01_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 10800 bytes
SHA-256: 8ffb7c250223e2eed7a5b5651c1b034a15e0ff3f40339165f62de8dedd17f988

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