Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68eee971e6d1c97…

MALICIOUS

PDF

75.0 KB Created: 2021-03-31 09:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c0ed21fed5347068552636753d2c6cb SHA-1: d38d7bef104a4b9859623261210f9b11a113a74a SHA-256: e68eee971e6d1c97148c50223b9d271af7ca48b63fcc026c1df09a7459e69844
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains text related to 'Palliative care guidelines for heart failure' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure. Numerous external URIs were extracted, many pointing to disposable hosting and link farms, consistent with phishing or malware distribution. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/123?utm_term=palliative+care+guidelines+for+heart+failure
    • https://fagajigabo.weebly.com/uploads/1/3/1/4/131438257/9594303.pdf
    • https://nomuxivobuga.weebly.com/uploads/1/3/4/4/134483798/keretujidazigojuwax.pdf
    • http://tijudozi.scienceontheweb.net/debumilubaxajol.pdf
    • https://cdn.sqhk.co/satukevaguka/DQa6dhe/telehealth_appointment_charges.pdf
    • http://ruwegekugite.22web.org/coliforms_in_well_water.pdf
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/jobafedulapod_fajosevimu_somilujovupo.pdf
    • https://cdn.sqhk.co/sarafogu/wtejcie/gaserivoza.pdf
    • http://guwidibedebom.22web.org/asbabun_nuzul.pdf
    • http://digogipexoluku.iblogger.org/8545677621.pdf
    • http://mupifojoxur.medianewsonline.com/37033602235.pdf
    • https://cdn.sqhk.co/xegunorasu/iiv8Urp/dr_kongara_ravikanth.pdf
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/7275833.pdf
    • http://kolagiriwu.22web.org/67810217023.pdf
    • https://cdn.sqhk.co/xakalodesi/O4wigkM/chaita_video_hd.pdf
    • https://nulowuze.weebly.com/uploads/1/3/4/6/134614321/8331048.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gafedupeba/carolina_kitchen_menu.pdf
    • https://s3.amazonaws.com/risalenefazozo/37992018528.pdf
    • http://jalugasazipun.epizy.com/how_to_get_my_hp_officejet_4630_back_online.pdf
    • http://rewezaxow.epizy.com/adobe_reader_portable_version.pdf
    • https://s3.amazonaws.com/bisegilupuf/72031494883.pdf
    • https://s3.amazonaws.com/tomaxade/chaar_sahibzaade_1_songs_djpunjab.pdf
    • http://xotaferuju.myartsonline.com/mugilixiwanivejogesej.pdf
    • https://s3.amazonaws.com/difigomisosak/ziwasosaminesisov.pdf
    • http://runonadopufeta.epizy.com/87675533872.pdf
    • http://fotizojorirepel.onlinewebshop.net/sodifoxinizovipik.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b4.bin
9115b7fe2030bcd2a73b848c02d8cb4b6c78859f9aba906a12837c4e6382a1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 5344 bytes
font_01_sfnt_off0000fadf.bin
002669dfa5aed4413bf606afd874b0a1a5cdb73a826011fa490e853d0ea83dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 10348 bytes

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