Malicious PDF — malware analysis report

Static analysis result for SHA-256 95982f94f51d7eab…

MALICIOUS

PDF

75.9 KB Created: 2021-02-28 08:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16da6a03080509ce60fa858e6ef28e81 SHA-1: b4f8d051bd60a1a613d4a2b7f60f280fedc241c1 SHA-256: 95982f94f51d7eab4c92b362b7d32a981cabd793eaf5099f428670b9952c6b41
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-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://pelibifir.ru/123?utm_term=how+to+use+pine+sol+on+hardwood+floors PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375088/normal_5fcd53bd61f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_6037edfebd9c0.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/12913702234.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/how_to_pay_a_cell_phone_ticket_in_california.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5fd67759bb96a.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/barrett-_jackson_auction_2021aqzwr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5fde0a004e55b.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/what_is_breaking_news_today_in_india.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/the_amber_spyglass_quotes_love.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/nafojafen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_601f66f23c295.pdfIn PDF document text
    • http://ruszaimclub.ru/185481343132uf0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401691/normal_5fec378a4c47c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_60373d1c44f50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/zarexozorutepidabakekatet.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/map_of_the_world_with_country_names_and_capitals.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/itg_mpu_gy-_521_datasheet.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/are_schwinn_spin_bikes_good.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 5064 bytes
SHA-256: 6fc9d6ae3699a388d2c1b5d018fcd71f004c460a5db5635848f774473aab84bc
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 10464 bytes
SHA-256: 2c4977db148b91789671a6b4dbd33238ac0fa9daebb134948740cdb02fd85810
font_02_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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