Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5a7b8625fe910b…

MALICIOUS

PDF

79.5 KB Created: 2021-02-24 21:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0ff76269d5f9dce541cfcd23f4f781c1 SHA-1: cc14cc958e71e50d647b92820e1b2b01c0e397d0 SHA-256: 2c5a7b8625fe910b363ac1f5f0a3ea0191200fe4a872001732773256633cb015
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs, including a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=the+exorcist+2004+full+movie+free+download PDF link annotation
    • http://ru-dev.xyz/what_is_the_best_holster_for_a_taurus_g2ciyftk.pdfIn PDF document text
    • https://digutejuwunapon.weebly.com/uploads/1/3/5/3/135325267/5646754.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/how_to_use_a_greenlee_digital_multimeter.pdfIn PDF document text
    • https://kagoninu.weebly.com/uploads/1/3/1/4/131453226/fineluri.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/proceso_de_investigacin_de_mercados_tursticos.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/5947194280.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/what_is_the_difference_between_hatha_and_vinyasa_yoga.pdfIn PDF document text
    • https://surevasod.weebly.com/uploads/1/3/1/8/131856145/1023403.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/beroreg.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/6424341.pdfIn PDF document text
    • https://buvonumonub.weebly.com/uploads/1/3/5/3/135304713/pisuxizunojudetile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/viwoxuz/fomukadidew.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/how_to_remove_delonghi_infuser.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/photolithography_process.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/best_android_emulator_for_app_development.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/lizutupuvekobut.pdfIn PDF document text
    • http://livirava.atwebpages.com/76479352762.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 5676 bytes
SHA-256: c05f821060d09c89732ae06597cffb6df2fecd7a1d5c800f7d762d19078051fe
font_01_sfnt_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 10652 bytes
SHA-256: cc3e7c90268235cb9005ca2535187d5db07756927533f4f730165b1e7c872b85
font_02_sfnt_off000122e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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