Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a41391425dd21e…

MALICIOUS

PDF

90.5 KB Created: 2021-03-21 23:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21eeadc63e7cb926e8cdb3836c896f54 SHA-1: 9b12cd75c99a15a13b5e7a2cce8f89a097704838 SHA-256: e6a41391425dd21e38027e84572c086e3faeb96eee7e13c9e6c7157678c16920
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF document contains numerous embedded URLs, many hosted on disposable domains, and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, appears to reference 'Us armed forces enlisted rank insignia' as a lure. The presence of external URIs suggests the document is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ponafet.ru/strik?utm_term=us+armed+forces+enlisted+rank+insignia
    • http://pazadixokumox.sportsontheweb.net/what_is_the_theme_of_the_story_glass_menagerie.pdf
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5fd32df71e4c4.pdf
    • http://zasasalusip.22web.org/71387129350.pdf
    • http://tuzupibu.scienceontheweb.net/celula_animal_vegetal_y_bacteriana.pdf
    • http://monongzhlh.space/nordictrack_c990_issues91nn7.pdf
    • https://wenewemegidipep.weebly.com/uploads/1/3/4/6/134679414/1400015.pdf
    • https://cdn-cms.f-static.net/uploads/4501383/normal_601ba704b39bb.pdf
    • https://kiwakobomu.weebly.com/uploads/1/3/1/4/131482833/c7307ad7eb.pdf
    • https://cdn-cms.f-static.net/uploads/4381297/normal_601b986356bdd.pdf
    • https://cdn-cms.f-static.net/uploads/4446030/normal_5fd906cfe7717.pdf
    • https://static.s123-cdn-static.com/uploads/4427086/normal_5fe037cb3db38.pdf
    • http://itwow.info/410893533906ab71.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://musizaxodolof.epizy.com/recherche_alternance_informatique_ile_de_france.pdf
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_e59cb1d8730449f1813c73f1a23cb676.pdf?index=true
    • http://dizekalukojulap.rf.gd/68342338311.pdf
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_0a525593ea9a4b65bc0d7de96ba83cfd.pdf?index=true
    • http://matogidujizovoj.epizy.com/transformers_animated_bumblebee_fanfiction.pdf
    • http://gevapugono.atwebpages.com/interview_with_the_vampire_book_vs_movie.pdf
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_1bca03e0a0914bcb83ddf5fafb4eb5f4.pdf?index=true
    • http://fusuxitizubuka.epizy.com/13835710383.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012361.bin
2d018a3f5e05bfe8ef079d745f038e88b5a1c9f2f4e157111df48a76170dbfcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 5396 bytes
font_01_sfnt_off000135ac.bin
b66283fe646808b6bd14d60f8ef87865e7b020751a27e849d3e42568ef6c12bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135AC 11520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.