Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a83e9db42874e50…

MALICIOUS

PDF

75.2 KB Created: 2021-03-21 10:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 34ed17a576225c87121291c6af59a3bb SHA-1: a1640e1317b51f569362afe696aef7ec4f04de1a SHA-256: 4a83e9db42874e50af3aa412dc186de5f5552105c29ec7967a7768cc40dbc742
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites. The document body, though heavily obfuscated, contains text related to employment, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=what+does+macy%2527s+pay+seasonal+employees PDF link annotation
    • http://wisitens.online/dedavexixibujetawuxixolelkbjz6.pdfIn PDF document text
    • https://cdn.sqhk.co/gedodupem/eiiijgi/free_emotional_afro_beat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fd3c2a4838d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_6011cceef008f.pdfIn PDF document text
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/539bad80f26.pdfIn PDF document text
    • http://lordtrans.ru/24732840048a4f9c.pdfIn PDF document text
    • http://paktum.pro/gta_liberty_city_stories_psp_downloa0hdl5.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/lihjj4i/8374897640.pdfIn PDF document text
    • http://idealicaitalia-official.site/dawivipadurij1prj8.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/fwdIjaM/52046741822.pdfIn PDF document text
    • https://nanarimedut.weebly.com/uploads/1/3/2/6/132695535/zosakez_puzuzo.pdfIn PDF document text
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/relasutuzepuzaz_waguk_lufudesaxifowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477379/normal_600113660f054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_60075f97a8d93.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/gcgidgd/skater_kid_style.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/lunededebalud.pdfIn PDF document text
    • http://chtotakoevuxom.biz/xfinity_remote_codes_for_samsung_soundbarszyn4.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/dicqIii/84929851029.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/wazorixekunafob/boeing_ethiopian_airlines_crash_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/81850427118.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/fekafibidemarupenodafojij.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/what_happened_to_china_stock_market_today.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_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5368 bytes
SHA-256: 05b95904df4633bdfae1c96e8cf67b36d41c593b25ea2bf74fa85520da7488fc
font_01_sfnt_off0000f993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF993 10952 bytes
SHA-256: 52a57c923bd97f6a93c8c6d6debea3b707a7e83d6a3a18846e31841b2f8275af

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