Malicious PDF — malware analysis report

Static analysis result for SHA-256 688a9eb811259334…

MALICIOUS

PDF

74.1 KB Created: 2021-02-05 17:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fa78b470ad6e6603091411c1f0937d0e SHA-1: 9ba4f6cd260f2e5e88bfe5e3bcbe51de08997aef SHA-256: 688a9eb8112593344b28d8c927d133a4592a7e098c1d815edeffb624ab9f26a4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection for phishing and trojan activity. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it's designed to redirect users to phishing sites or download further malware. The presence of external URIs and link farm characteristics indicates a deliberate attempt to obscure the final malicious destination.

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://leonvi.ru/123?utm_term=schwinn+phocus+1600+price PDF link annotation
    • http://my-favshopf.online/superman_comic_book_value32p0y.pdfIn PDF document text
    • http://busivel.xyz/red_rose_pizzaey2ce.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/eja5vih/fosujudulavabudatunal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5fe8ee217bebd.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/dopimipifazoxipojunadonohcml9.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/37Ugei2/all_goals_football_live_score_download.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/20c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5fdb0b353f4f7.pdfIn PDF document text
    • https://jozisanolotodix.weebly.com/uploads/1/3/0/9/130969335/loreniduparuduk_zazigivokigonu_sixujej.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/28hehdl/52320346139.pdfIn PDF document text
    • http://fastpysystem.online/photo_studio_photo_video1eabw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 5320 bytes
SHA-256: 895a7e95469b583419a3a0e9220aba1e3e36de1bc334456021725365939d9c37
font_01_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 10952 bytes
SHA-256: 48341edbbefa613e629e707c8d265c14e1940418092270798cf0675b9fd74b8c

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