Malicious PDF — malware analysis report

Static analysis result for SHA-256 8440794b621b639a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-16 18:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 72c47c187cbddb6b6739183a5e3831e4 SHA-1: c858c8d53edc15c3e9d5862bef999da5f2ede921 SHA-256: 8440794b621b639a661818dbeb7f82434cafa5fb7057271c9f31e9a50db05c35
186 Risk Score

Malware Insights

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

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 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
  • 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.
  • 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://dafemum.ru/wix?keyword=iron+gods+player+guide PDF link annotation
    • http://spacexfoundation.net/23385769094gbbz1.pdfIn PDF document text
    • http://doordash.link/252922309380724c.pdfIn PDF document text
    • http://inostrana.com/70271528743iicj2.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/jiggha5/zelda_parallel_worlds_rom_download.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/07a3421dfcb733.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/gejcIgj/4824557921.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/wetajizokil_figireto.pdfIn PDF document text
    • http://m-ryanaf.site/3821789511177hdp.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/1jajbYa/eat_it_all_bbq.pdfIn PDF document text
    • http://vipadminler.org/international_royal_mail_tracking_number891p5.pdfIn PDF document text
    • http://pshcomonhere.xyz/69561175869f1b6y.pdfIn PDF document text
    • http://bigtittybella.com/nc_drivers_license_renewal_practice_signs_test39d66.pdfIn PDF document text
    • http://hugertely.xyz/lee_county_public_schools_calendar_2021tf7m2.pdfIn PDF document text
    • http://exampl1214.com/me_and_earl_and_the_dying_girl_castb8lid.pdfIn PDF document text
    • http://relax35.ru/how_to_install_codechickenlib2106o.pdfIn PDF document text
    • https://mibajajezek.weebly.com/uploads/1/3/4/0/134017497/4c01cebf7d.pdfIn PDF document text
    • http://haifaiv.ru/toca_boca_life_hackswe8ux.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/aMJhb2Q/gasukafi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_95f08585700b4815bbc40fecd3f643e1.pdf?index=trueIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_e406416eea014214946563ac5b1526c7.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_cfaf59b914f2460192a5e293be5ad569.pdf?index=trueIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_cab3e8af41dc48b881db51132ab3c1e4.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 5168 bytes
SHA-256: 27ac81c810b4c4c8449ef61ef583138f1a80a8bd88cfa0e255f8af363ee7928a
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 10532 bytes
SHA-256: 62ed635534751df26e7bdd1973184d2b65cc264833ef30eeaa3ec92d691946e2

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