Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e925a715f224db…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 11:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 13e4999b97d170a5fb6fa1deedb65eb9 SHA-1: 275db9e4694dc1a099d9b523ebc1dc0b43c97bd9 SHA-256: 87e925a715f224dbbccfa5fff27cfca0952fa6c5dc26e5d4a7ae765fde910504
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The presence of these links suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=new+england+beekeeping+supplies+inc+tyngsboro+ma PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fcabaa99fdb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_604aa34c6b3bd.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/1heZic0/lanilaxudilodamazo.pdfIn PDF document text
    • http://govnosiakxws.online/why_is_snape_the_half-blood_prince_significantq9jei.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/Ff01ujf/nojepopabenenukovoruvim.pdfIn PDF document text
    • http://reznitskygallery.com/54541033447omanx.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/8b2ihvY/nigabenefep.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/geRjdia/castlestorm_2_switch.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/6ef30884-f4a0-47d3-8309-217b6dc555d3/nonton_streaming_film_after_met_you_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac519e3b-9049-4430-84ca-293e9e9b02de/38922454790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78ce6c5-0baa-42fb-a599-9d834a7d89be/kerajeteledejapafefafonaw.pdfIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_8f04af301f79443385637193b34505b3.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_52cb3e904c434f1a874e86f2cc344930.pdf?index=trueIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_a7835c8b7ef24bb5b5c6212ceb3dfede.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/36105688539.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_7f28f98597cb46d487971fc0a15d47a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ninasivol/worthy_of_every_song_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1edcb3-f66b-4dc7-8286-cfaf57228b0f/30874133493.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/11059973044.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_off0000eb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7D 5760 bytes
SHA-256: a43fd436735ab8535696c3c3af18b9a61e7f8a6fa02ec75295b9db400a57c378
font_01_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 11488 bytes
SHA-256: 4b14e4351c7ff95189a8d281d864d2e389485ee583a77278c93993d676988a36

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