Malicious PDF — malware analysis report

Static analysis result for SHA-256 f656751c9147dcc4…

MALICIOUS

PDF

81.7 KB Created: 2021-05-07 19:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4b1975e97d36484a2c59f266a2f1058e SHA-1: 26e776fff91f094e1e4dc1f5629c896816858053 SHA-256: f656751c9147dcc4293ae222bda154c91a96cdf70340e16d929ad91cba1f9adb
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain that appears to be a link farm designed to redirect users. The document body, though heavily obfuscated, contains references to search terms and application metadata, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to a malicious site.

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://mezovuduw.ru/strik?utm_term=keurig+k40+spare+parts PDF link annotation
    • http://musc-media.xyz/how_to_upload_portfolio_on_classdojoy4bi9.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefotebe/gfBIoja/tribles_inc_merrifield.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/egdOGid/94581961891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5ffb03afdfb03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476436/normal_605db79541f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_60661fddca307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5fd2abb969cd7.pdfIn PDF document text
    • http://parkji5x.xyz/67219357677xncpq.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/m757hhD/the_wolf_among_us_season_2_news.pdfIn PDF document text
    • http://csxmoney.info/5318763977w9qrs.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/fMjfvgj/61015011342.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/YehcHvE/world_conqueror_2_mod_apk_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namelabapir.epizy.com/3227210807.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/joratemidasokasaruxej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3002d381-f153-41d4-a9e8-389ced96ac76/why_is_my_phone_not_ringing_when_i_get_calls.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/lejuluzumotenuleroxem.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/conway_south_carolina_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2454c9a-5034-4dbb-b91b-767e48ec7170/64034596773.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/26940455740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c24ca31-6e81-42d1-8ee5-4731ac8131c0/the_official_phreakers_manual.pdfIn PDF document text
    • http://pavinudoj.epizy.com/95917595416.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 5220 bytes
SHA-256: efe72de6db00aff3426d1f5e7de78cb5d961143641dd33e0f75af0721fcde076
font_01_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 10832 bytes
SHA-256: 30eb9ea5b7dfcef0f835628d61811cf8af506490c726b07f4a2fa2530c09e123
font_02_sfnt_off000117c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C2 20232 bytes
SHA-256: 4c61a449d80843ff81a79e022e9984b0786c883573e9aa312d70c08f05046cbb

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