Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6985abfa7bbed2…

MALICIOUS

PDF

76.8 KB Created: 2021-02-19 21:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 66cd9106554340ebd542947cd17b6b9b SHA-1: 9e475f9383be4b93a8d9e0902636a12c7f58f627 SHA-256: ff6985abfa7bbed230e4b5405d95d2925061c07018f257d08cd4328a823777d9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to exploit kits or phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/strik?utm_term=final+fantasy+7+remake+ps5+frame+rate PDF link annotation
    • https://cdn.sqhk.co/fogobewataja/iccgcGX/7952357227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5feeb61c70d3d.pdfIn PDF document text
    • https://lekorasosin.weebly.com/uploads/1/3/4/6/134612915/0a5cd261caa18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_602057867a93d.pdfIn PDF document text
    • http://itash.space/682823517866axj7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_60017aec49d5a.pdfIn PDF document text
    • https://sulumakopata.weebly.com/uploads/1/3/0/7/130775191/0c4b8f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418567/normal_5ff55699afb14.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/zidodudiravadoj.pdfIn PDF document text
    • http://salopkisa.website/84539561311txepw.pdfIn PDF document text
    • http://magnetfix.store/quality_trailer_products_freeport_mn2b287.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/dwqnVsj/free_robux_robuxian_giveaways.pdfIn PDF document text
    • http://kiwalapisetovu.iblogger.org/aankhon_ki_gustakhiyan_lyrics.pdfIn PDF document text
    • https://rafunipigadim.weebly.com/uploads/1/3/1/3/131380466/b2116e61edec5f4.pdfIn PDF document text
    • http://cosmeteca.com/tekiferetunazekedakugeny309r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijibito.epizy.com/autobiography_of_mahatma_gandhi.pdfIn PDF document text
    • http://kibomurabinide.epizy.com/92285381563.pdfIn PDF document text
    • http://pamakejexo.epizy.com/vonuvoj.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/44042793723.pdfIn PDF document text
    • http://jewabavetedow.epizy.com/pewugifubifulozidanabe.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_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 5372 bytes
SHA-256: 5b4dd1c201762a47faa02a25eb121b79319a7b8f7377bf76ed6cfc5f9fc7c855
font_01_sfnt_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 11252 bytes
SHA-256: 02f7ceb7bb142d1f58a0b1ac492fa87054c21704553ee518b0308b6d8b6bb7ad

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