Malicious PDF — malware analysis report

Static analysis result for SHA-256 572191f48a526f55…

MALICIOUS

PDF

77.4 KB Created: 2021-02-21 15:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 228aa87d9418239e3ff728eec8b6c6a4 SHA-1: a4f557d9b69a6e6f92e9e2ceb5535ee7d1b162e9 SHA-256: 572191f48a526f55ca5a9f281569d2cfd2ca707dcbbb7465fc0cb732e5191ba2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a phishing or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=microsoft+access+tutorial+pdf+in+hindi PDF link annotation
    • https://lefusovu.weebly.com/uploads/1/3/4/0/134040443/8602893.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/8022909.pdfIn PDF document text
    • http://girlita.space/ruloniluposatalilijuxan8p8oi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_60143d5231b9d.pdfIn PDF document text
    • https://tirusagoxavux.weebly.com/uploads/1/3/5/3/135329940/waxigavasoxep-letomiwikot-mibumisemenis.pdfIn PDF document text
    • http://osummer.space/41917980086ss4oj.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/2099018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6017164a74650.pdfIn PDF document text
    • http://datab.vip/vobowelosexur4ccit.pdfIn PDF document text
    • http://dsv-trening.ru/color_change_photoshopd00ms.pdfIn PDF document text
    • http://detonicinitalia.website/suxavokulikanamanupoj253q.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/zonogig-kepiw-binefapew-jalulovizuxeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_602a07749af53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_6001ec5a19f5b.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/7846882.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/zosedezorawurij.pdfIn PDF document text
    • http://fufinekudag.epizy.com/23260603315.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/xofadabagiradadi.pdfIn PDF document text
    • http://kepipejesa.epizy.com/zikuzagibudu.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/tikivi.pdfIn 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_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 5248 bytes
SHA-256: 931e41e5fafdb6dfa8ffc00a7b11b56f8f252ca16109ff8d63d91bb796bc3eb9
font_01_sfnt_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 10732 bytes
SHA-256: f734c3ffa102ee8c4170d4129969cc02471f205ac7621500e9758f544c08dc47

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