Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6624a69e41833b7…

MALICIOUS

PDF

78.6 KB Created: 2021-03-09 19:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 44d59bdd687f228a87564870d41c8db9 SHA-1: 81329a3fb3279ad2e1f4c94fe92eda9d94650ed0 SHA-256: d6624a69e41833b7c477eaf0af2674d5a7e8515bfd97caf2ae2dcf8a5ebaa520
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links pointing to disposable hosting domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of external URIs and the link farm heuristic strongly indicate a phishing or content distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/strik?utm_term=belkin+n300+wifi+range+extender+software PDF link annotation
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/xevesunik-zagowelab-manutizudedubat.pdfIn PDF document text
    • https://ropumalopiku.weebly.com/uploads/1/3/4/6/134613257/bd3996aae379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_602d810fb15c1.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/5862810.pdfIn PDF document text
    • https://kemusasozez.weebly.com/uploads/1/3/0/9/130969555/kegugiz.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/mabekolirakuwove.pdfIn PDF document text
    • https://fikobovivinuzo.weebly.com/uploads/1/3/0/7/130739062/9871169.pdfIn PDF document text
    • https://legupapepunune.weebly.com/uploads/1/3/0/7/130776309/tamupen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414498/normal_60245d199a37f.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/dDzDwif/auto_clicker_for_roblox_ios_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/4hdGJij/game_maker_language_an_in-_depth_guide.pdfIn PDF document text
    • https://gokepitamewema.weebly.com/uploads/1/3/5/3/135325242/152569.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/bhcqyjg/84697338598.pdfIn PDF document text
    • https://jibalasimitosex.weebly.com/uploads/1/3/4/5/134528580/9006921.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/Wgjk6hc/sovaxuginelolibiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wafasojudo/jhhjwhh/business_manager_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_5fd7b33229e50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5ff2d63ee9d0e.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/kapenumer-zawigidu.pdfIn PDF document text
    • https://zajinepimasi.weebly.com/uploads/1/3/2/8/132815118/kabejukibis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5fed246eaa88c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369933/normal_5fc643de2e509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_5fd88c7ad6d77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404757/normal_5fe41ee9e533e.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/zizipu_bubexi_buwado_sumevo.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_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 5656 bytes
SHA-256: 6e459099b2bd9137f84c5292082bf967a8f9e4368a31d3b8866585da6ced62b7
font_01_sfnt_off0001075d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075D 10948 bytes
SHA-256: 6984b18ff1a7620133b8206fe87b1fdb9442754282eea4e6db531494520c83d3