Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae74c6389f63ee6…

MALICIOUS

PDF

76.6 KB Created: 2021-03-21 10:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7645e11a86a842f06d15fed816a6ff4e SHA-1: 6e78e97c8dbd85d551e60ad9f51107e46a6c12aa SHA-256: 3ae74c6389f63ee6b81e9438dee663a05c3808a11a37ac01569bb968346d0ac0
134 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/award?keyword=waltzing+matilda+ukulele+pdf PDF link annotation
    • http://erogancolumbia.site/76249084791dk2ue.pdfIn PDF document text
    • http://instapriz24.site/smart_watch_phone_u8_bluetooth_touchscreen_smartwatch_for_androidokszs.pdfIn PDF document text
    • http://shoop-fl.ru/tewawixojugekofxj5vy.pdfIn PDF document text
    • http://limaxinsto.xyz/gevosatomedififerolas5eyo.pdfIn PDF document text
    • http://photoforce.ru/mogifodigome7wfjm.pdfIn PDF document text
    • http://lofitner.buzz/lejemagakowuki78w.pdfIn PDF document text
    • http://flymoney.net/beware_of_dog051ci.pdfIn PDF document text
    • https://cdn.sqhk.co/lirerafi/asgggcj/zinanikeziwun.pdfIn PDF document text
    • http://7lessons.site/vuwuvufusaforirelofix5xb5.pdfIn PDF document text
    • http://probkin34.xyz/zotifajekujornxo0u.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/q6FihiF/32535342853.pdfIn PDF document text
    • http://astropsychology.site/mafia_city_cheats_without_human_verificationn46ve.pdfIn PDF document text
    • http://espaceabone.com/pobelodaacoxo.pdfIn PDF document text
    • http://samyog.ru/18948110132vhxhv.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/5HSjihd/gegitozanuzudofesi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedipamevo.epizy.com/body_workout_book.pdfIn PDF document text
    • http://kakafemapekumu.epizy.com/89526344269.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_7f952026e7b04cda86276d307199f0cd.pdf?index=trueIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_fa28efe37ef74021a0c93ccc8f337c9d.pdf?index=trueIn PDF document text
    • http://xakafoboveje.rf.gd/ketokilelogilomomad.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

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_off0000d797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD797 5212 bytes
SHA-256: db94c5c7775bc4670420fef84f90561b2286ad487dacbd9ba4667e26737181df
font_01_sfnt_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 11592 bytes
SHA-256: 514f770b60bebae8af671dc2e89790efb8df7ffb1426c469d9798e9ab9df8210
font_02_sfnt_off00010fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 16248 bytes
SHA-256: 9e020c854edd9d16e76d4d276d806d6ad9537766fc0f49e31c6b0dee74960295

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