Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25dea091eedab2d…

MALICIOUS

PDF

74.4 KB Created: 2021-02-20 21:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 84dd82fca405e8dd39ce2ddff93b4f3a SHA-1: b0c40ef65ab0b7dde8d45d35692800f13b257e75 SHA-256: d25dea091eedab2d0b06d3c6d1c66833f3bafb55614b7aa2d96a13eb65fd9410
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('maypoin.ru') that appears to be part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=coleman+electric+furnace+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496216/normal_5ff1b09a5553f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493578/normal_5fe7212071556.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479460/normal_5fe55fa8ddd5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5fd0940b58b97.pdfIn PDF document text
    • http://findssldz.xyz/xomarudijijiguxavexuvumef2g38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://matezule.rf.gd/asphalt_8_pc_game_windows_10.pdfIn PDF document text
    • http://fazesiviwor.rf.gd/macmillan_english_language_book_1_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/performance_appraisal_methods_in_hrm_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/kepogafovuvegumugurupe.pdfIn PDF document text
    • http://dodigemadepa.epizy.com/big_fish_game_manager_mac.pdfIn PDF document text
    • http://pimorem.epizy.com/27803221687.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/4278662180.pdfIn PDF document text
    • http://pikiregofi.epizy.com/get_used_to_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/cabala_judia.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/kegovot.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_off0000d504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD504 4752 bytes
SHA-256: 88135e58dd7cc8a95c31d4a6bc934b88cd8c53ad0b0cb4fac70c28a504767917
font_01_sfnt_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 10252 bytes
SHA-256: f09f2790d7f22b1edb864836bb8c4fb7eab4a21eec965e4e461565ffc397f8df
font_02_sfnt_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16

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