Malicious PDF — malware analysis report

Static analysis result for SHA-256 42730eb4d1d3b87f…

MALICIOUS

PDF

90.9 KB Created: 2021-03-18 10:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 89d1176837bd887eca1ac19da221664d SHA-1: 4aaef7af14ae87002e6762abcd93799254cd1c67 SHA-256: 42730eb4d1d3b87fd1a8cda96255d948200840989eb0147cf5c031b0635cf9bc
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

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://soxebez.ru/award?keyword=information+system+audit+lecture+notes+pdf PDF link annotation
    • https://cdn.sqhk.co/pasezateda/hiZfLnV/58746468772.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/jjsMcnc/nedamomale.pdfIn PDF document text
    • http://paxabak.mypressonline.com/how_to_give_a_treasurers_report.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/W4ibjgb/roveseminifotukasixure.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/OqafjbM/19747019412.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/remuponi-gadajejuzavol-vopedonaj-rekumad.pdfIn PDF document text
    • https://vomimefime.weebly.com/uploads/1/3/5/3/135316042/vagizek.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/ijPwggz/fivofozevixaz.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/vihWY6k/70103658472.pdfIn PDF document text
    • https://zizuvikugit.weebly.com/uploads/1/3/1/3/131384696/lilori.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/9mnhamt/11436667573.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/ijaymTX/44081410558.pdfIn PDF document text
    • http://lazirawolewok.getenjoyment.net/97241243728.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xodeboraduzex.epizy.com/making_customs_declarations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13ccb2c-1c9f-4629-a3b0-94bd0d7d3828/65988913164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77541b35-4bc2-42c8-9cee-9c4c68cd337e/2013_subaru_impreza_hatchback_speaker_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9b15cda-03c6-4517-8eb0-7905cdb1cf56/47954761522.pdfIn PDF document text
    • http://luvetux.myartsonline.com/wilton_decorating_tips_chart_printable.pdfIn PDF document text
    • http://pagujuropiwadiv.rf.gd/how_to_work_tv_at_planet_fitness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c179c221-8708-48ae-8d06-2c53e16c2dc5/wovapumifota.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_off00012486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12486 5340 bytes
SHA-256: 6e3fa6c11ef054f599b7c15125f1838b2f3555e24331c07680ab058c27aea9e5
font_01_sfnt_off000136a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A4 11568 bytes
SHA-256: 5ccdfe10c61b8c6940db21f22f977d329cdccdd1c5b5fc124559c0429ade2387

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