Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb354b1a8f691d5…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 19:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fdc2c37268680546dbecdb867104b5d0 SHA-1: 0875897686c47c62804718789baad610bf115848 SHA-256: feb354b1a8f691d54a5e427f76f574ee356d20b87e1115329993a888a4dceab8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan activity. The document body, though partially corrupted, suggests a lure related to 'technical project management'.

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://druttle.ru/123?utm_term=what+is+technical+project+management PDF link annotation
    • http://canlisohbetim.net/engineering_thermodynamics_anna_universityckyko.pdfIn PDF document text
    • http://chambreop.xyz/how_to_register_uconnect_2019_ramq42gi.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/h8WZs2h/banner_saga_2_choices.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/whAib18/asana_stock_price_now.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/ta1Lgh6/59790401651.pdfIn PDF document text
    • http://nujuxogo.iblogger.org/1606116073.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/qjjeji2/10491691623.pdfIn PDF document text
    • https://cdn.sqhk.co/ledusefugize/gir0OCx/wumeloz.pdfIn PDF document text
    • http://persequenteamsohbet.com/a5_2016_android_7_frp_lockat787.pdfIn PDF document text
    • http://autocredit.moscow/tokurubusarewobaj2r3le.pdfIn PDF document text
    • http://jilet2.club/crazy_driver_taxi_duty_3d_hack_apk_downloadje3mj.pdfIn PDF document text
    • http://milansit.space/wd_tv_live_hub_firmware_version_3.12.13svud1.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/wuvepilamamuse/56460012513.pdfIn PDF document text
    • http://magivaxinel.rf.gd/among_us_mod_apk_new_map.pdfIn PDF document text
    • http://fitunugiwa.rf.gd/1929636598.pdfIn PDF document text
    • http://letituxis.epizy.com/modern_macroeconomics_sanjay_chugh_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/android_x86_emulator_without_hardware_acceleration.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_off0000dd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD98 5436 bytes
SHA-256: 63541cd469ee777de7df1f79b88dfe418d7cde84e92bba819f80eef9d3db422b
font_01_sfnt_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 10300 bytes
SHA-256: 7d4818a71b0e8061f4b85e140c9dda751ffc47691c526b6c8ae4dd9c530e65c4

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