Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f337b7c63d6f58…

MALICIOUS

PDF

81.4 KB Created: 2021-03-12 12:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ee2ad22c23cf8ecf0b648ead8744f514 SHA-1: 2ada378ad10f2314c4ed4f3099d16768f2c599e0 SHA-256: 53f337b7c63d6f5839562eab6c559cd25acc84200009e1495a642127a8d61733
166 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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of 'LOLBin token sequence' and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://zajinet.ru/wix?keyword=alpha+sigma+rho+temple PDF link annotation
    • http://sis-paypal.com/28163417763x8ter.pdfIn PDF document text
    • http://roflan.site/dnd_5e_wizard_healing_spellsw1fka.pdfIn PDF document text
    • http://dreamingdeveloper.com/btdt_meaning_in_englishi5cj0.pdfIn PDF document text
    • http://pmaider.com/clasicismo_orientalwv3ur.pdfIn PDF document text
    • http://gatorama.space/47856922036nbfnc.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/82331999514.pdfIn PDF document text
    • http://babblescoop.store/where_in_the_world_worksheet_answers9ngr0.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/24361054717.pdfIn PDF document text
    • http://makamar.online/mix_colors_to_make_sky_bluetxvl8.pdfIn macro / runtime command snippet
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/7779559.pdfIn macro / runtime command snippet
    • http://sugameloxufe.mywebcommunity.org/tewavugutufoderul.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/loxojazatugip-tuzononitej-bemuxereta-wixikawomote.pdfIn PDF document text
    • http://klosheff.xyz/jfk_flight_status_departures_deltall6gd.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/sabobenuwe/border_radius_input_android_studio.pdfIn PDF document text
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_316578933cbf4152b8f729a41d871263.pdf?index=trueIn PDF document text
    • http://gixarewujedel.atwebpages.com/math_4_trig_ratios_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/zesugijefivotima.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/pecha_kucha_20x20_presentation_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/barbell_wrist_curl_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/77820322263.pdfIn macro / runtime command snippet
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_2d30497ca6994a78978d19c2dfe52df0.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_c48458f91b5c409ca12e0d36d938a1f9.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_0bc388ea10e84a9bad686ec662d6dc30.pdf?index=trueIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_9ecfa723a06042c3866197cdad8d8ed3.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 3012 bytes
SHA-256: dc7b4080cde8bb57c8781cfb811b023c26e2f3f611dfb9eed3e3302db088095c
font_01_sfnt_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 5224 bytes
SHA-256: fc8e154887395b7f2a422d3ee4464cf220604dc3a577f937de3924dab715df09
font_02_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 10872 bytes
SHA-256: 0dbc6d86426bbc971c176845ccb4119fd3398226a5a30817b563e726223c1eae

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