Malicious PDF — malware analysis report

Static analysis result for SHA-256 affd16bfff18ed26…

MALICIOUS

PDF

75.4 KB Created: 2021-03-11 13:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b4053c9b98fc46e62b1229b1442413de SHA-1: 58cdc9e1c943cd5d732e95c61f70a91876c19deb SHA-256: affd16bfff18ed26c94a2cdacc82f56597257481703f46c65bd9c5be1e2b982b
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, with a notable heuristic identifying it as a link farm on disposable hosting. The primary malicious URL identified is 'https://baarspo.ru/aws?utm_term=dd-wrt+dir-615+e3+repeater+bridge', which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/aws?utm_term=dd-wrt+dir-615+e3+repeater+bridge PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366047/normal_5ffb7e1516d5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485446/normal_5ff428bce466c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5fd13c84e2d2a.pdfIn PDF document text
    • http://like-store.site/composite_functions_questions_and_answersypp9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492240/normal_603571b9f3de0.pdfIn PDF document text
    • http://blacklaser.ru/omron_body_composition_monitor_with_scale_manualsspk9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_602dad79d3c31.pdfIn PDF document text
    • http://matteset-spon.space/horror_play_scripts_for_high_school5n30e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poresiz.epizy.com/alcatel_one_touch_mobile_phone_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/93351519179.pdfIn PDF document text
    • http://didajuna.rf.gd/how_to_set_a_400_day_clock.pdfIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_7cc925646c0f45f7b69a69a0893dc880.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26517817-c54c-48e1-8bb0-df30c4fa42ae/98544648129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4727f90c-9c90-49b0-a08c-7cd63823946f/verizon_ellipsis_jetpack_mhs800l_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/video_buddy_app_for_ios.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_db7f63e1aae04425b6433c9203ec6d67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e08f7b-e5fa-4b40-a93f-9b1ef2c5f132/kigobowapiret.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/30572598554.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_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 5676 bytes
SHA-256: 54b6b4a27302692d13521790ece5d5acbe3f284fdd44b5c7ac4b68c428b53d5e
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 11104 bytes
SHA-256: 0c1045da9868bed6b6e4eb19fc2e52c2014e1729d4c71cdf31027788bf7290f5

Open this report in the interactive analyzer, or submit your own file for analysis.