Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24c06e23baa922c…

MALICIOUS

PDF

68.0 KB Created: 2020-11-23 18:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28db7d8106331b40fe6017c0292f5a28 SHA-1: 5d8b2f49ed913da8d3bc2accf987700a8d9d1c0e SHA-256: d24c06e23baa922cc2b70bd42434fbe952f55d7072c25ce20581e13dd91ba433
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains and hosted PDFs, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URL 'https://trafffi.ru/strik?utm_term=dominique+alfaro+hooters' is a primary indicator of the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • 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://trafffi.ru/strik?utm_term=dominique+alfaro+hooters
    • https://zijixowopuza.weebly.com/uploads/1/3/4/5/134524639/gekawipewax-bojetafok.pdf
    • https://cdn-cms.f-static.net/uploads/4469143/normal_5fb66e49e6419.pdf
    • https://fofebufog.weebly.com/uploads/1/3/4/7/134738758/bowukuretir_pikubonejinoje_nevejuwatuwi_saxaw.pdf
    • https://falumegobe.weebly.com/uploads/1/3/4/7/134702986/fc76a994aa51.pdf
    • https://cdn-cms.f-static.net/uploads/4484169/normal_5fad3ce290a2f.pdf
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/6649408.pdf
    • https://savipamezixu.weebly.com/uploads/1/3/4/6/134673646/df960c060568.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pexodugosa/statistical_process_control_free_download.pdf
    • https://uploads.strikinglycdn.com/files/aea90ccf-0f49-4cb6-a034-31d372a0adba/tobagigulerora.pdf
    • https://uploads.strikinglycdn.com/files/0b920cd9-0df9-4d12-b71d-67f3f3ec10c7/kawadunifove.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c393.bin
007e8def3b4e4504bba18d561700811ea1765051cf1b1d6da0cc75bb7da28d27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC393 5132 bytes
font_01_sfnt_off0000d4de.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DE 3720 bytes
font_02_sfnt_off0000e041.bin
a5e254d8578bfd473bfaddde5e5735384a9edbeb3eaf6bc1e97d8f5b36546ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 10320 bytes

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