Malicious PDF — malware analysis report

Static analysis result for SHA-256 44820a22247deec2…

MALICIOUS

PDF

75.0 KB Created: 2021-02-23 06:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3998a10e9852232b98ab24328010c1c0 SHA-1: 280867ee43eb6c186cc1a579fb552294c71bdb4b SHA-256: 44820a22247deec2976ffede820a57b3e26a2784d0a03d3b90e3f2dbcb1cb60a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to financial markets, likely to trick users into clicking malicious links.

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://bologen.ru/123?utm_term=foundations+of+financial+markets+and+institutions PDF link annotation
    • https://cdn.sqhk.co/kulobibab/e3heIsN/56950028321.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/bjbKhbT/ultimate_wolf_simulator_2_mod_apk_download.pdfIn PDF document text
    • http://tamakar.tech/download_facebook_versi_lama_apkpure67ce3.pdfIn PDF document text
    • http://item-mask.top/kuguvitem2dlu.pdfIn PDF document text
    • https://cdn.sqhk.co/sutekepape/TZghdzr/health_tip_top.pdfIn PDF document text
    • http://all-host.site/pakikuxejevemonu9911.pdfIn PDF document text
    • https://cdn.sqhk.co/joxufejod/bggfIjf/gulapuzagejer.pdfIn PDF document text
    • http://clobuss.ru/malayalam_movie_dear_comrade_full_movie5fxii.pdfIn PDF document text
    • http://medgaj.com/15055595036j5al5.pdfIn PDF document text
    • http://alania365.ru/4539831275661nxl.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/uhhq0ha/mefigakesojadedabet.pdfIn PDF document text
    • http://imm-shoes2.club/536608453697p8m2.pdfIn PDF document text
    • http://thestablestl.com/tibenedekesuliwi8yty9.pdfIn PDF document text
    • http://egosikenclub.com/botowapezifu4uw6h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jofisakukobi.rf.gd/jack_reacher_never_back_cast.pdfIn PDF document text
    • http://wokesoz.epizy.com/kexurovibas.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_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 5184 bytes
SHA-256: b1a89167a603614784821a4f708fda390796c697fa03ee470835051e6e828c0f
font_01_sfnt_off0000f8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 11156 bytes
SHA-256: 3d5f390a8fc76f34a6849d7f8b3df4a496b6f8fe9374d784c721641c51f4aa9d

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