Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d266f9501df7a9…

MALICIOUS

PDF

74.9 KB Created: 2021-03-06 00:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c3f8724f05221fcea1e6040d90d8cf33 SHA-1: 24d0d500208959ccf6cd7c095bd8acada2ee00d6 SHA-256: a7d266f9501df7a9f3a1f7482b3253ab32080097e92bdc3b2633209ce44be6b1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://soxebez.ru/strik?utm_term=after+4+anna+todd+wattpad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461250/normal_602a779174772.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/5664056.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/hfIAMoF/pvr_cinema_amritsar_movie_tickets.pdfIn PDF document text
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/509e2.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/logic_pro_10.1_system_requirements.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/3639674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5ff0edad2a9bc.pdfIn PDF document text
    • http://zuraleres.mywebcommunity.org/chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_full_movie_watch_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417523/normal_5fceaa1646438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_5fd902bf7058d.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/jewonokesixajebaxavi.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/xovabanetumipuxekize.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/e1af190b68.pdfIn PDF document text
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/d54910cd.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/cgh1wgf/hide._me_vpn_app.pdfIn PDF document text
    • https://tozikogok.weebly.com/uploads/1/3/5/3/135330875/zoxurejapeludup.pdfIn PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/gijipibox_wukadutavisog_fidasade.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/469390.pdfIn PDF document text
    • https://jubolovewo.weebly.com/uploads/1/3/1/4/131453214/pigepofoxukibem.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/vojutokekodasufetaw.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/wujixus/cabrestante_manual_bricomart.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/mifofabuda.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_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 4992 bytes
SHA-256: bb2778a61e54f5de8052bde15b69208460344ba01d84a4ccb6cbe2d060bf7043
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 10672 bytes
SHA-256: db700d8c3be027a4a5550e81f53934f596fe13c738812a5ca893a13a7c8bb6b0