Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d70239fd6fda3b0…

MALICIOUS

PDF

81.7 KB Created: 2021-03-18 00:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b202cb77105290f9467484e4072f1e2a SHA-1: 940f158231ba2371ae4bf82ea12d28984621f112 SHA-256: 8d70239fd6fda3b0d94374604123d9409da52ebd6176879320157266c74b87d0
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://jottigo.ru/123?utm_term=bmi+calculator+application PDF link annotation
    • http://banewotovotewe.iblogger.org/57929211532.pdfIn PDF document text
    • http://getarileduvuda.22web.org/50199923322.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/fwN0fO0/weniginaxibonenilobalas.pdfIn PDF document text
    • https://cdn.sqhk.co/puranajav/gegegfV/epithelial_tissue_histology_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/tgcichh/parchisi_star_online_gameberry_labs.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/aQ21ejc/vigemiji.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/FwqHggg/24109216265.pdfIn PDF document text
    • https://cdn.sqhk.co/keximovib/ddz9tTT/prescription_sunglasses_red_lenses.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/54Hjbgg/jiffy_lube_chicago_ridge_il.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/jdxhdkS/game_of_fun_ball_cool_running_adventures.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486190/normal_602b0ec8c06a1.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/hj0C5gg/ardyss_body_magic_size_guide.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/rikepubujomivutogozatuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fd68b8a80b27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jetisadan.rf.gd/hvac_supervisor_interview_questions_and_answers.pdfIn PDF document text
    • http://sawokemapixaf.epizy.com/countif_not_empty_google_sheets.pdfIn PDF document text
    • http://vurisadazuxe.epizy.com/masuwefofadavituposal.pdfIn PDF document text
    • http://muresapidun.epizy.com/absceso_pilonidal_tratamiento_antibiotico.pdfIn PDF document text
    • http://savejanaxejov.rf.gd/93508411159.pdfIn PDF document text
    • http://botamokawafaj.epizy.com/jodofiziwodemi.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/meaning_and_definition_of_mathematics.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAF 4952 bytes
SHA-256: 31b1917fbf1392ad80b5c3aad2a8ad0acb92d7718c7322be754d1c58e33744bb
font_01_sfnt_off0000fd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD70 11384 bytes
SHA-256: 2966869f9169e4564db5d0abec467969468f85c9257b700f659f58f625e0a68f
font_02_sfnt_off000124ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AD 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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