Malicious PDF — malware analysis report

Static analysis result for SHA-256 f482d04cb69e007c…

MALICIOUS

PDF

71.8 KB Created: 2021-03-22 06:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32e24398379837de96b908258202aeb6 SHA-1: 28db117db313bf840e38c88e2b7017fb059925f5 SHA-256: f482d04cb69e007cb71a2e313eb55118eb744669c00bbf40ba70836d37b798c5
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 0.9997

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
  • 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://botokaw.ru/strik?utm_term=how+to+change+mode+on+ti-30xs+multiview PDF link annotation
    • https://cdn.sqhk.co/rutisifelom/hagcdmW/53585925454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5ffc4cf76bede.pdfIn PDF document text
    • https://cdn.sqhk.co/simikimira/hwOjci0/69039512826.pdfIn PDF document text
    • http://top-shop-store.website/building_the_gymnastic_body.pdf7246q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_6041bae8156d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5febcc421f9e3.pdfIn PDF document text
    • https://bodupakodekafas.weebly.com/uploads/1/3/2/6/132680796/7737725.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/07247019.pdfIn PDF document text
    • http://sarkife.site/disorderly_conduct_charge_nyx93x6.pdfIn PDF document text
    • http://netlysy.online/aptal_beyinw7hb3.pdfIn PDF document text
    • http://osthondroz.com/71727761719coduz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_6013ec81ccaa4.pdfIn PDF document text
    • http://zanartcc.net/87499143417aud3q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_594058ffa15d48da863ece25d59962af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/garmin_2595lmt_review.pdfIn PDF document text
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_e207f64e8a62482ba40530fbca4d572a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fazujo/aleks_math_problem_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/xivokepegajotamasabubixa.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_c00d28849a414161977a6c656272fabb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/3699805688.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_fe7e96a642684b7b97208e3abad21044.pdf?index=trueIn 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_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 5776 bytes
SHA-256: e53f7264cc54de83aec2fb362109137f874a55e3b8b425da8e7fd3270492b747
font_01_sfnt_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 11452 bytes
SHA-256: 4b37637bbde9c4ca3daab9df8b26a2aee2c4eb7c6ce2e2561ecaa8d3099d3830

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