Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f029a157c4f738f…

MALICIOUS

PDF

76.8 KB Created: 2021-02-26 21:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7874e319067b6b364fd8dfc66d187db9 SHA-1: 3b46ea5393950c490b9b2047deb081975a6353a7 SHA-256: 7f029a157c4f738fbf1957872270a0bb458635e6bea033e766fbb2e78fb4dfac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://xezojetit.ru/strik?utm_term=best+midi+to+usb+cable+for+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402740/normal_5fe71803cc3e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459791/normal_601ad452c3142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_602ed8ef7b5f3.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/nPhc1UD/gopro_max_360_video_settings.pdfIn PDF document text
    • http://drenajkrasnodar.ru/nejetubaziginamogilorg6msw.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/buzokiva.pdfIn PDF document text
    • http://gnatural.space/243658397050iqa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390637/normal_5ff104f0c37bc.pdfIn PDF document text
    • https://cdn.sqhk.co/dawezizupata/Vjjied6/the_bucket_list_movie_cast.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/desh_bhakti_all_ringtone_free5d3ho.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463005/normal_5fe0ec9e4d077.pdfIn PDF document text
    • http://sodahq.club/jovodosumoxuf6e374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464297/normal_5fc95d901130f.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/2746700204.pdfIn PDF document text
    • http://youralteragoods.com/sony_nsg_mr1_manualzhwa3.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/vejivakaveg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/mezofabavaxadexaxogukekit.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_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 5356 bytes
SHA-256: 5f90831db4a7d60010e6afea34e7873156340b6ed1b4b3350fe2ed136b9a59c5
font_01_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 11020 bytes
SHA-256: e3dc49f5da195b2612a89b56fb3eca4eb77b9759132407bf676e3466da2434c0

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