Malicious PDF — malware analysis report

Static analysis result for SHA-256 839313aa43512f34…

MALICIOUS

PDF

68.5 KB Created: 2021-02-14 03:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e92406d7f31c4c7080740833bbf2dc3e SHA-1: 1a1d345fa45f2ae3314030e981e7197180de2f4f SHA-256: 839313aa43512f342643292beeddc9c042546d5a5e9aaaa38c670c3945cacb36
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to a manual, likely used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://maypoin.ru/wix?keyword=saunders+cervical+hometrac+deluxe+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447447/normal_60000a506743c.pdfIn PDF document text
    • http://ditumen.22web.org/49263068281.pdfIn PDF document text
    • https://xubivotalo.weebly.com/uploads/1/3/0/7/130775972/7175370.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/jdZNzux/k1_speed_racing_near_me.pdfIn PDF document text
    • https://dadurafiwazozu.weebly.com/uploads/1/3/4/7/134768329/5663944.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/hhjjdhd/6841036129.pdfIn PDF document text
    • http://gikisivota.iblogger.org/affliction_warlock_pvp_guide_bfa.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/hd0gcgc/47165927112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_600c8dc0affa3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465685/normal_5fee98ab02595.pdfIn PDF document text
    • https://baxorejo.weebly.com/uploads/1/3/5/2/135295822/f1c2e38447ce18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5fcf5ea6a9c71.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/amTijKB/jojo_arcade_game_download.pdfIn PDF document text
    • http://nejuposusim.iblogger.org/bink2w64._dll_zip.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/vosogalapaxikebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_60155b46e62d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5ff94263a6c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_6020d17318f81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pejefovad.epizy.com/transformar_de_binario_a_decimal_online.pdfIn PDF document text
    • http://wewejozajukenat.rf.gd/fevitutolorukinaxijeniza.pdfIn PDF document text
    • http://dabixuri.rf.gd/akmn_beden_dili.pdfIn PDF document text
    • http://gidigeja.rf.gd/match_columns_in_excel_sheet.pdfIn PDF document text
    • http://wubifut.rf.gd/articles_exercises_perfect_english_grammar.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_off0000d023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 5412 bytes
SHA-256: 8c5467f4b716ed805823030ca92759850315f10d771c4692eee72181fbeaf970
font_01_sfnt_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 10176 bytes
SHA-256: 423eb8a3b4d299dee44027ee67effdcc90db56ef452f1672c617fd186cce27f0

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