Malicious PDF — malware analysis report

Static analysis result for SHA-256 051c1f6b765f992c…

MALICIOUS

PDF

80.9 KB Created: 2021-03-08 23:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6cc4e53276ff347b011e9e758af09628 SHA-1: a4dcdc1bcdfc797a69e9ea643507a8d39701d250 SHA-256: 051c1f6b765f992c36080e6a8b5a0704fd015a523a0cde1a01ea49ba9667581f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external URIs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URIs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, potentially as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/award?keyword=3+golden+rules+of+accounting+pdf PDF link annotation
    • http://zitugaxusi.mygamesonline.org/sunilalewezolirovudiwovik.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/97466152262.pdfIn PDF document text
    • http://stylecurtains.com/free_compass_app_for_iphoneopdcb.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/titus_andronicus_summary_and_analysis.pdfIn PDF document text
    • http://salea.site/vabinukr99de.pdfIn PDF document text
    • http://kyrgyztours.com/jeginavon6pqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_600efef17bb72.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/international_business_news_today_in_hindi.pdfIn PDF document text
    • http://help-verification.com/tafadivetunutom4wtm5.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/what_is_the_traditional_music_of_singapore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_603a3dfc67f2a.pdfIn PDF document text
    • http://dalnoboyi.xyz/how_to_interpret_data_in_science_projectk0d06.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/pride_and_prejudice_elizabeth_and_darcy_character_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawanumezal.onlinewebshop.net/zuvatabujanojixudewadofeg.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/algebra_workbook_online.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/6213879773.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/linear_motion_lab_report_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/3d_animated_powerpoint_2013_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d2d5cc-939a-48fc-94cf-f714a05016ff/how_to_write_a_comparative_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f32ad77-0090-49d4-a448-96c42eef141a/kilumidabedemet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be50f4a-f6ae-48e0-a08b-3987f44721b8/dirijuzuponevagad.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/pharmacokinetics_of_antiepileptic_drugs.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/ac_market_apk_4._0._5.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_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 5392 bytes
SHA-256: 619f09ffb55fed3ad4f8fbcb9382240bb6b0f83cdffd7a7257847c15848a5966
font_01_sfnt_off00011349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11349 10080 bytes
SHA-256: 4390aa737a6c6168e4b691d639035ea24a203bc21851baa8db8d03f19ba87d9c

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