Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5467403d30631a…

MALICIOUS

PDF

76.1 KB Created: 2021-04-04 20:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8abe57e632b1eef2f08cab455e9ca908 SHA-1: 2f654960080633b021b237f6c9aa8a9152650477 SHA-256: 9a5467403d30631a038ea7d5463f64da7b227505587c9a6c2af47dabc62101bb
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious or suspicious domains, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and embedded links are designed to trick users into visiting harmful sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=cable+management+system+software+free In PDF document text
    • http://saxefitipar.iblogger.org/forgot_my_apple_id_security_questions_answers.pdfIn PDF document text
    • http://hookup157.site/resimopiberottq3wt.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/pLgi66w/excurzilla_excursions_museum_tickets.pdfIn PDF document text
    • http://getcabinets.xyz/warlock_wowhead_classic_guidecpkss.pdfIn PDF document text
    • http://hisgohar.site/answers_to_riddles_in_squirrel_nutkinnbskm.pdfIn PDF document text
    • http://firstreadersclub.com/355609300228gj6l.pdfIn PDF document text
    • http://megantv.site/tigubitukivunesivokubanehmbxt.pdfIn PDF document text
    • http://copyrights-notices-helps.com/70265796122wvr7f.pdfIn PDF document text
    • http://presentinsta.online/3210948833zpz2f.pdfIn PDF document text
    • https://cdn.sqhk.co/xupixawina/Esid3AU/majakirebopezogalisix.pdfIn PDF document text
    • http://fb-copyright-help-from.com/what_is_the_surprise_ending_in_after_twenty_yearszm619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b0837e58-6fb0-4b2c-a83d-c451c4d85cc2.filesusr.com/ugd/1169b1_6f72ad40d0b74744910cca701db28bf4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebomedug/sekinisejivi.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/41100245061.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_f474a523a6474266919f89116a79f1e9.pdf?index=trueIn PDF document text
    • http://zepurudevivo.rf.gd/25085106011.pdfIn PDF document text
    • http://rodidop.epizy.com/tifagulepigupufudogebu.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/farazax.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/fapumubisujabakuz.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_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 5324 bytes
SHA-256: 827718257571c605af6742847f98510b6da760624adcc6d971970ec1234abba3
font_01_sfnt_off0000fe5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5E 10728 bytes
SHA-256: 2d15940d5420352c57ee6473c3bbb527daf67efe2fe9fdc12b0ac50e0822bb45

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