Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98f443bbebb9800…

MALICIOUS

PDF

109.9 KB Created: 2021-05-17 09:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d2cdb6259d8c386677d5eaa65c4524d SHA-1: 9342b5ef538101ac6c78905eabfa803e50e19d5b SHA-256: b98f443bbebb9800c2fba39137c9d3629d4ae3a43c86dbd2c3ec80f3a17e8062
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/strik?utm_term=sas+survival+guide+pdf+download PDF link annotation
    • http://tifimazupidad.iblogger.org/1663108119.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/guvisig_wedoro_dutasexesew.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/hfenxW4/baloradapififarew.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/mA5iaiE/bombay_cat_for_sale_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/cqgddib/89018718406.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/6c865402cdb328.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/jemesubezurafo.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/chcGEjd/peviko.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/hgj9jdZ/alien_isolation_art_style.pdfIn PDF document text
    • https://robevumike.weebly.com/uploads/1/3/4/7/134767989/8812693.pdfIn PDF document text
    • http://menedowu.iblogger.org/master_franchise_agreement.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/jhAhgia/14834624551.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/347213dbe497626.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/riwopagulurub.pdfIn PDF document text
    • http://pajugurujuvavux.22web.org/importance_of_capacity_planning_in_operations_management.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/voxof_rukemupizi_butixetixesim_zedabunesekaj.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/fefurorobumi/what_is_a_good_score_on_kaplan_nclex_diagnostic_test.pdfIn PDF document text
    • http://wuxiwojimi.rf.gd/kunudiviganovigeregosezo.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/rukotazivamanesinadafuteb.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/55173732697.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/indian_chicken_curry_recipe_madhur_jaffrey.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/saletusono.pdfIn PDF document text
    • http://supoxurenabix.epizy.com/cdr_to_converter_software.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF2 5464 bytes
SHA-256: 348636ffd7321832cfda950825c42b1d96d60e41b03aefd025b8ff2145612812
font_01_sfnt_off000180a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180A9 11684 bytes
SHA-256: e17ef8df29c436b6b3ca8bb5bfa6f0580e44a02d39e3416edf6a6740558f0928

Open this report in the interactive analyzer, or submit your own file for analysis.