Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b63e35e1c685a8…

MALICIOUS

PDF

80.4 KB Created: 2021-03-15 20:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 02f9efc3eb5da4fdbd69f871cf89bba0 SHA-1: 2ccce35065f9623f5299bdf87ca5121b446579ff SHA-256: f0b63e35e1c685a8c9d815db340ee59e41942b59f4c6923f340734e6fc60e25b
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 0.9993

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://jumiwimov.ru/wix?keyword=bloons+td+3+towers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462036/normal_600e59ad21e5d.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/ggvQpUO/gozudajozijavegikiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_604acf52ece84.pdfIn PDF document text
    • https://rubisudowe.weebly.com/uploads/1/3/4/7/134766222/7645270.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/jhfLzjg/weather_underground_seattle_radar.pdfIn PDF document text
    • https://rawesare.weebly.com/uploads/1/3/3/9/133997405/wulibex_gonuvezewa_piduxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_600c97988027d.pdfIn PDF document text
    • https://pobivizitonep.weebly.com/uploads/1/3/2/8/132815986/bepufawelen_tagoxiponidasi.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/jhjgjeK/fapefa.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/Wjh7hsN/marojexefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426423/normal_604cba8176d15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600e24acb61cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_796f45a5264849be940f334a8c35e7cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mosezavor/wojeret.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/drivers_education_of_america_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c73ef0-e9cf-4c4b-a6b1-784ca1d554a3/cooks_essentials_bread_machine_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/future_english_for_results_1.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/fingerstyle_guitar_nails_or_no_nails.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ed561a-07d4-49ac-8ecc-76ce620ef77b/lipelapumele.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/cambium_e410_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede6f37d-f9b6-4a2f-8c8a-221c1b6fdace/poxobuwavivanuvalezobabas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc287f4-cd73-437e-9cd8-96ee44f9c9ee/53530618203.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_63f22b4c14a54608baf1dcb3abb0ebf0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10c1406-4697-48a2-a0e0-2fb28a8f6761/zinubosipagar.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_off0000fe25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 4916 bytes
SHA-256: 647ca7075ecda2bc31b1a33886ae66d7f289c172fcc043c5cbf48eb7fbe842dd
font_01_sfnt_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 10916 bytes
SHA-256: 532f5fdab5effaebf287c49e9c3653f928c6e4ef8b9c1578267de6ccc69e3d1e

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