Malicious PDF — malware analysis report

Static analysis result for SHA-256 03eaf579d2c71852…

MALICIOUS

PDF

92.5 KB Created: 2021-04-11 13:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f95431244b229567eaeb1d9f0be7d5f6 SHA-1: 48c3bf4f7b6846d4ade675fa79feea89b5e29c43 SHA-256: 03eaf579d2c718522814c4dd922c9037f5472c1794c40474d206094e8c23f6ba
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to search queries, directing users to external links. The presence of numerous links on disposable hosting and redirector URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://maypoin.ru/strik?utm_term=how+many+calories+in+arby%2527s+beef+and+cheddar+meal PDF link annotation
    • https://cdn.sqhk.co/bitomasijelo/hfabhap/jagapozalepisepavedej.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/heTjhjj/daluluripigebakito.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/eigjcia/bidazeju.pdfIn PDF document text
    • https://cdn.sqhk.co/muwanije/ygd3s2J/rogue_legendary_weapon_hearthstone.pdfIn PDF document text
    • http://wopedejani.iblogger.org/answers_on_a_postcard_hull.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_606c4baac3414.pdfIn PDF document text
    • http://rutinesuzufogat.mypressonline.com/tujewej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_606cf14d338e7.pdfIn PDF document text
    • http://piwupulor.iblogger.org/31938047231.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/i5zpjeR/country_music_station_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/zgc5Dgj/75282640418.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/nJhaXha/vadizunupisokuf.pdfIn PDF document text
    • http://motirepefasake.iblogger.org/administracion_de_los_canales_de_distribucion.pdfIn PDF document text
    • http://geforiro.scienceontheweb.net/bovesapenupel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_604f25b55089f.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/ieLZgdg/impulse_response_guitar_cabinet.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/Gliijep/xaxojibuwodufilola.pdfIn PDF document text
    • http://tulutita.sportsontheweb.net/ragirakibonovufudiwaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67d8a8e-05bd-4800-8298-064dec18df0c/60049456050.pdfIn PDF document text
    • http://kotopofixivu.rf.gd/fixujalometikopopogetuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38273bf0-b0fd-435c-814c-b68929b4f6f1/rofesalolivadevif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c521ad9c-128f-4a4c-8080-6f6b757a9572/rehraas_sahib_path_sikhnet.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/matalan_formal_mens_shoes.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/physics_book_for_css.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd185d2-deff-4a07-b58d-818b387a859d/suvewakitijasefan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11eb2177-8c74-4dca-b714-60640eaa9727/zolotuninegoz.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_off00011110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 5588 bytes
SHA-256: 58eb284467f33895338df204a0499c0a518aff1f3104810ab221c23ec2f72935
font_01_sfnt_off000123fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FC 12332 bytes
SHA-256: 624e74bfbed131a0bec5517972758acf872e8932b8e5b52fee44c449cb4ec462
font_02_sfnt_off00014e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E0D 16252 bytes
SHA-256: 92ccd17c7dcf4d1ab3e4a6e0dca9b280837f7f1712f9c5724e01b49c837636b9