Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3fb37d67a76459…

MALICIOUS

PDF

71.5 KB Created: 2021-03-10 12:19:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 873e7502f69e08555c9c8dadd8acaa48 SHA-1: 2660a18a875be3765b4ad7198a281f8d233f47ac SHA-256: 4e3fb37d67a76459b2e30191694be14c212cf7eb079514d6e747633dd82d9776
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=when+we+were+kings+streaming PDF link annotation
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/5978215.pdfIn PDF document text
    • https://pirulavedup.weebly.com/uploads/1/3/1/3/131379447/56e11a69e5faf6.pdfIn PDF document text
    • http://dress-russia.ru/tegujamavobawumusopuxir5mk1z.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/sizesaravokesifuwul.pdfIn PDF document text
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/mogawe-sakeninakuletep-pejoluv-buxowetu.pdfIn PDF document text
    • http://prodson.fun/books_of_the_bible_law_prophetsd1es6.pdfIn PDF document text
    • https://cdn.sqhk.co/mebozesilo/zijifjg/3d_skull_atlas.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/Vv7jgcE/rebel_inc_full_apk_download.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/kepagidimetes.pdfIn PDF document text
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/7eab7a2e17.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/ijeniiR/desert_rider_sandwich_shop_menu.pdfIn PDF document text
    • http://dizotegi.iblogger.org/sejuwuvudemixasibidag.pdfIn PDF document text
    • https://mefimume.weebly.com/uploads/1/3/1/4/131437875/2af31.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/vofojeliwibosegegax.pdfIn PDF document text
    • http://lalabomujulimof.mywebcommunity.org/diferencias_entre_capitalismo_y_socialismo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://podazowek.epizy.com/java_string_format_prepend_0.pdfIn PDF document text
    • http://dejanubotikepiw.rf.gd/53973032066.pdfIn PDF document text
    • http://vasazizo.epizy.com/derobuwapeno.pdfIn PDF document text
    • http://donixug.epizy.com/pinutizilolukupibapakez.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_off0000d314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 5236 bytes
SHA-256: 6c7dbbbe23f4da394dae47d1d85c432dddb73066579b068d39668a2d6f571314
font_01_sfnt_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 14088 bytes
SHA-256: 112a966edc99b11f6894a964181220d6d10581e633b9f0abf6a469b8c248aee1

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