Malicious PDF — malware analysis report

Static analysis result for SHA-256 35719f9c574e4b16…

MALICIOUS

PDF

85.1 KB Created: 2021-03-25 16:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e6ab80cf2284b2df689596beb9687f SHA-1: 555006623734199c4e27e4502b78e37dec0af58b SHA-256: 35719f9c574e4b1608a1498c2cfe39f3bcc0bb1c454be890f95f60066d3710d6
156 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=epson+xp+600+ink+walmart
    • https://cdn.sqhk.co/resozasevej/ji0Wgjy/senuwobo.pdf
    • https://cdn.sqhk.co/fedovipawe/EjagflP/pesevewuzafufagedej.pdf
    • https://cdn.sqhk.co/gafisasiwu/ggih5jJ/62818902185.pdf
    • https://cdn.sqhk.co/vuvapolaxaj/9jcijhd/defender_90_review_2020.pdf
    • https://cdn.sqhk.co/xavipinav/hhfd6gg/60850665424.pdf
    • https://cdn.sqhk.co/xonipavu/jF5MV7U/murder_mystery_movies_pg_13.pdf
    • https://cdn.sqhk.co/suvotoruwot/hbniajf/marooned_movie_synopsis.pdf
    • https://cdn.sqhk.co/lerapuraroke/iighcjb/nogigokitabemozifi.pdf
    • https://cdn.sqhk.co/xudadidi/aY8U75K/spiral_staircase_movie_2000.pdf
    • https://cdn.sqhk.co/mapetidul/bmiaZji/dumowanezazuk.pdf
    • https://cdn.sqhk.co/koxixoneto/mhf0ohi/zomuwewofuna.pdf
    • http://memaviwebepa.22web.org/kutegadasaligere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_599ec942eb8642f8944c26fb1c9321a5.pdf?index=true
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_8b9d591a2aa24d1d8a38e695e8b5cb24.pdf?index=true
    • http://fisazivibutaz.epizy.com/crazy_craft_mod_1._14._3.pdf
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_229dae6ba80749fe86a343869e133796.pdf?index=true
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_2b91185a5f6b4769adbf753078e0198a.pdf?index=true
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_b419fc21c9624b46a6961c0b44a55cd4.pdf?index=true
    • http://vabizofolimise.epizy.com/the_hungover_games_2014_parents_guide.pdf
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_cc3dd7da89e349a1899ca146ea9c40fc.pdf?index=true
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_4bb3579b039e45d99a69e1ebdc34f1de.pdf?index=true
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_eba193d2719b4a7086d05263fbd94ccd.pdf?index=true
    • http://relurifiluxel.epizy.com/concussion_diagnosis_guidelines.pdf
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_2af83d94cb8d4da2a560f1b3684489c4.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f738.bin
dbe596862bd0d26394971782e11d53785c1b5ad284018492f3c922c4d888f1a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 5440 bytes
font_01_sfnt_off000109c1.bin
5afafd7fd2d24b444b5b2988fe6995746ac3ff8f9b50854419eda1a13dca5b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 11644 bytes
font_02_sfnt_off00013065.bin
fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13065 16084 bytes

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