Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9d23b103ed66d7…

MALICIOUS

PDF

106.0 KB Created: 2021-03-23 20:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 24e74b0babfc190a0e3ecd36e9243a4d SHA-1: e98b2e89cb32ac3b499f5d251e4be20f3f44b08f SHA-256: 0b9d23b103ed66d75fc627bad549ecf649eecc8fed378f3f30e62ac1be62d8b5
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 0.9995

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://soxebez.ru/strik?utm_term=dell+u3415w+specifications PDF link annotation
    • http://potuduwatolebu.mywebcommunity.org/kuxateloropozagajewigi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476002/normal_5fe52744d55ce.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/gigenuxarupetu.pdfIn PDF document text
    • http://bajuzupur.22web.org/la_la_land_soundtrack_record.pdfIn PDF document text
    • https://cdn.sqhk.co/zolususux/iigejPu/halloween_2020_events_los_angeles.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/jijevedogarezelejik.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_605512901f382.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/17466180210.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/uhfyW1I/fake_nails_done_at_homemade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_6014aaf9de64c.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/washington_redskins_record_by_season.pdfIn PDF document text
    • http://xonigej.mypressonline.com/tamer.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/xuxedaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469834/normal_5ffdc6ec80594.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/9568932123.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/xolisu.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/65c7c66a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5febd0d89191e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujumek.myartsonline.com/teoria_de_abiogenesis.pdfIn PDF document text
    • http://rimefuvax.epizy.com/metizome.pdfIn PDF document text
    • http://supovopekowo.epizy.com/13820351450.pdfIn PDF document text
    • http://rotaduwifomol.rf.gd/a_wrinkle_in_time_chapter_1_questions_and_answers.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_off00015e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8A 5432 bytes
SHA-256: 955db19775f3a0622b490981db3cd16aa67b23d70a39459bdb86b077a7a94c4d
font_01_sfnt_off00017149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17149 11752 bytes
SHA-256: d579b3cac77a8ac1ad5dcce08c839c7a5e7bee68c1462bde771d790d743ec52c

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