Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c588dade02c0d3d…

MALICIOUS

PDF

64.8 KB Created: 2021-02-15 13:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9c5b54215add271f80ce8693032377da SHA-1: 77eb5f1698c51a8f121205d47cb870cefcb51f6a SHA-256: 3c588dade02c0d3d4d570869e2c460e3268103d5ad475513d4d54d235b35341f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'construction cost guide 2019 pdf', aiming to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=construction+cost+guide+2019+pdf PDF link annotation
    • https://cdn.sqhk.co/jobebakegip/dQuchaT/apk_car_driving_simulator_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/dogiidx/73662215717.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/jdjj7Sa/rta_smart_drive_app_download.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/lixuvuvew.pdfIn PDF document text
    • https://musagitunoton.weebly.com/uploads/1/3/4/3/134368320/7872575657288.pdfIn PDF document text
    • https://cdn.sqhk.co/junukexad/eiggcjb/21858889501.pdfIn PDF document text
    • https://sovomebidug.weebly.com/uploads/1/3/1/3/131379042/wijogife.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/4640655.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/HidgfW2/peace_equalizer_apo_best_settings.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/nikezovaloja.pdfIn PDF document text
    • https://vizodejow.weebly.com/uploads/1/3/4/3/134356937/6753616.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/jukezeluf/25600315311.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/dekom.pdfIn PDF document text
    • http://pelotisevinok.rf.gd/verona_performances_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/bernardo_stamateas_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/alan_walker_love.pdfIn PDF document text
    • http://pofazutufugu.epizy.com/fazitanolufobolibufazu.pdfIn PDF document text
    • http://kopuperoki.epizy.com/19328301623.pdfIn PDF document text
    • http://topadut.epizy.com/cisco_firepower_datasheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC075 5468 bytes
SHA-256: a6523834ed9b5ec7c96d643e90657e38102db07f7ef3a632a64b24ccc5583b9c
font_01_sfnt_off0000d325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 10284 bytes
SHA-256: 72711a4728e14c6317b558b9676d9deb1fa17b696e905c492cc6e618fe6b8842

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