Malicious PDF — malware analysis report

Static analysis result for SHA-256 b395414879679719…

MALICIOUS

PDF

122.5 KB Created: 2021-05-27 04:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fb7dee72a5287b79fd3bad8d726a0bd5 SHA-1: 7b0d15e6d68e1e6de63034ad62a92b2b857ce67c SHA-256: b3954148796797192211a047cd113e853674aefcea0f2473a99164e41f121c9a
244 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The presence of a link to a known malicious redirector further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/strik?utm_term=the+house+of+da+vinci+walkthrough+chapter+6 In PDF document text
    • https://gabopubowiton.weebly.com/uploads/1/3/4/5/134596717/3635814.pdfIn PDF document text
    • https://pesenulowujef.weebly.com/uploads/1/3/5/3/135325158/8509981.pdfIn PDF document text
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/19160.pdfIn PDF document text
    • https://polujififodujan.weebly.com/uploads/1/3/4/5/134512681/zetukakizipav.pdfIn PDF document text
    • https://fuburufogukedez.weebly.com/uploads/1/3/0/7/130776130/ab1cfc488.pdfIn PDF document text
    • https://gomarevijupa.weebly.com/uploads/1/3/4/5/134585171/3988b5359.pdfIn PDF document text
    • https://tozakewa.weebly.com/uploads/1/3/5/3/135398337/loxileledadaxe_gipukigegozije.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380413/normal_5fdf49d059490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_601739b81e746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_60436b298df76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bc9da0-0356-4746-9404-d622ae5ec235/9756253051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1826f9f9-cefd-40d0-b29d-688a26f0185a/fetikujuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ee2394-b576-4dcf-b2c1-df3c9017befa/onan_marquis_gold_5500_generator_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10e6628-b0a1-4b15-b4f5-a1e12de424f3/can_you_scan_your_receipt_on_the_chick_fil_a_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4234937c-8058-4ffc-bf37-dc4c4946fe93/audio_libro_la_tejedora_de_la_muerte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ffba2d2-1ff5-4ae0-8a0d-fd14ecdd54a1/what_fuel_to_use_in_coleman_lantern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7ede85-d82b-4081-9cb1-b43f5fadb83e/what_is_a_crisis_communication_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff894621-7f6a-4cce-beda-15381d14c089/unblocked_games_66_at_school_plazma_burst_2.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A56 3736 bytes
SHA-256: 955938de3200a2312fedf2005874816f7c9c33180adcfbe06907798fc56cf76a
font_01_sfnt_off000187d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187D5 5736 bytes
SHA-256: a4bd692f93a6b93fae8bf44aef89f592676ce361585bd790278ea94385e8c1f6
font_02_sfnt_off00019b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B73 12724 bytes
SHA-256: c0d9888599848b7f8e0e9f6db79691622fd4af9d2ea91cb5037b60629ea1b4ff
font_03_sfnt_off0001c5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5CE 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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