Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bed988daec3e02…

MALICIOUS

PDF

77.2 KB Created: 2021-03-10 19:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1cdf89aedac0dfe2c21e3886ccb8aabb SHA-1: e1cc8fe9ec5ed522a4b5f9b7b5e61595518cfe06 SHA-256: 86bed988daec3e026b461089b8f7faa1a844afd1f1380795f107a7dcf1aa4b43
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 0.9996

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/wix?keyword=algebra+2+solving+polynomial+equations+by+factoring+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/nadipozow/2ijXhfA/mobile_philippine_passport_renewal_in_nz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_600d4e8178225.pdfIn PDF document text
    • http://callipakk2.site/al_kitaab_part_1zlrlp.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/rumi_a_new_translation_of_selected_poems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_602930951184e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_5feb1666ba185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fd2603c81d64.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/deriluduxobogu.pdfIn PDF document text
    • https://cdn.sqhk.co/wegifopi/dy6vQij/3d_animated_coloring_books.pdfIn PDF document text
    • http://modernstyle.pro/5396843629yswud.pdfIn PDF document text
    • https://tipuzivi.weebly.com/uploads/1/3/0/9/130969377/a91cfbe.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/jgqQgfX/xtreme_motorcycle_helmets_for_sale.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/58743659874.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/low_histamine_anti_inflammatory_diet.pdfIn PDF document text
    • http://pro-komp-master.website/4525175277ane3k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_601ca6d1aa95a.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/zewixumazewalisuwunut.pdfIn PDF document text
    • https://zisidolig.weebly.com/uploads/1/3/1/3/131379992/pedumegosas-zibukewid-tewunakadi-zadikad.pdfIn PDF document text
    • http://riwuvodobopexu.mywebcommunity.org/20162647845.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanunir/eMU7iaH/swiss_ice_hockey_team_coach.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifedisiso.atwebpages.com/68447386943.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_off0000ed58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED58 6132 bytes
SHA-256: c08621be2fefb2c7ee071631cbb99afaa11e27a072bf9e68a8eaaea223d6d3d4
font_01_sfnt_off00010236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 10612 bytes
SHA-256: 3fe6cf2079a881e0199b5dd0b227fbcb136f2de2566e7f131c6a7fb11e4838fd

Open this report in the interactive analyzer, or submit your own file for analysis.