Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d50f60841f58c7…

MALICIOUS

PDF

85.7 KB Created: 2021-03-22 06:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 83bbe35edc2f2887c07e61101fffab10 SHA-1: 9f56ca604ce1583e66dd20274e29ae62b7ba5283 SHA-256: 65d50f60841f58c767b625d3c48613e8f15d01d75cd7efc6a847fd2998603b59
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-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://bologen.ru/strik?utm_term=thetford+cassette+toilet+repair PDF link annotation
    • http://farilanij.iblogger.org/almanaque_2020_argentina_para_imprimir.pdfIn PDF document text
    • http://wurijudopala.22web.org/titus_andronicus_summary_litcharts.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/gunozol.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/0KICgjs/court_reporter_salary_2018_california.pdfIn PDF document text
    • http://mavosidofawuge.22web.org/navisejiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_6029674b6e329.pdfIn PDF document text
    • https://cdn.sqhk.co/somatugogo/aWorMih/8105984947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_6032c59646d7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ff663c2dd922.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/gCjdEhf/wesefalikerokuvifekizezit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_60538be3a025b.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/binadidudogipuxigaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/sgfZphb/73998767352.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/banking_and_finance_book_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454168/normal_604f6114196db.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/BUiiicS/now_wallet_app.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/vurepuparitewadometi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaderadosunuse.rf.gd/aifmd_regulation.pdfIn PDF document text
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_25e587856ea648258a08ab9fc43147c3.pdf?index=trueIn PDF document text
    • http://tudutov.rf.gd/2227745634.pdfIn PDF document text
    • http://witesenigo.atwebpages.com/autodesk_sketchbook_designer_tutorial.pdfIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_9d804e7c9674420ba8164fdf3f862668.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 5192 bytes
SHA-256: c46830bb20ca45f63ee345e3d0ca9988884fa663cb9107e8c4710afc54973fe2
font_01_sfnt_off00011baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAA 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00012437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12437 10768 bytes
SHA-256: e2a1234fde7479244c53d691fecd2cbb014ba2831b41d73dcc952d971a15763e

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