Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdd135bd7f8e5dc…

MALICIOUS

PDF

77.4 KB Created: 2021-03-22 08:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7d37dc75d356af84de5d094dac78453e SHA-1: 42a85670f12dead2553981e04f0d5c1a5ca15c48 SHA-256: 5bdd135bd7f8e5dca70097c83b94f95908ff69a1d2432d1b43598091adb48bf7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/wix?keyword=z+scores+worksheet+answers PDF link annotation
    • https://zutomivopisi.weebly.com/uploads/1/3/6/0/136051870/vukegepixokiwun_desura.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/free_graphic_design_software_for_chromebooklgwm9.pdfIn PDF document text
    • https://topudamix.weebly.com/uploads/1/3/4/5/134581811/4133800.pdfIn PDF document text
    • http://korsabarca.com/8020070010551oy9.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/acer_aspire_one_netbook_drivers.pdfIn PDF document text
    • http://souve.me/serenity_prayer_tattoo_for_femaleg9rpv.pdfIn PDF document text
    • http://redirunna.xyz/1984_john_deere_316_for_sale7ii65.pdfIn PDF document text
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/nunekobupinejipege.pdfIn PDF document text
    • http://wordsidepost.top/12068410517ezzh8.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/2530492.pdfIn PDF document text
    • http://pink-echo.club/bamufoxuvikes37tdj.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/72202054506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490519/normal_60218edc8842c.pdfIn PDF document text
    • http://toportt.online/sozupitemirarepk9mf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fe87a5f9b5eb.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/d1dde5.pdfIn PDF document text
    • https://jatazuleb.weebly.com/uploads/1/3/4/6/134662889/paporaji-pozogug-jexaduko-riretakilega.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/briggs_and_stratton_450_engine_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_6026f8b5db81e.pdfIn PDF document text
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/8048321.pdfIn PDF document text
    • http://rocketdocs.us/how_do_you_program_a_charter_cable_remote_to_your_tvkx6g2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465264/normal_603ce50400f10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kitilogokufalu.atwebpages.com/dazepufojarozufas.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/71754304466.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_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 4968 bytes
SHA-256: ee3b4cd95556387e02665e0ad85c55b9151fccf7fd24e5ac83e7302a8787984c
font_01_sfnt_off0001038a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 10752 bytes
SHA-256: 6bdbda8de8f169ceae97fd0e847ea515409a485338d55caca8cdfc3ea1491f1d

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