Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5b32708b9e75b5…

MALICIOUS

PDF

77.0 KB Created: 2021-04-11 17:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6022f8956341c479b79349a66a621b7c SHA-1: 89372f1b60c751badfb3b6aed6c5d8c964230b44 SHA-256: 2e5b32708b9e75b54cfbb81611615ad47e7edc1cc30bb5def419a88c8762652c
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 0.9997

Heuristics 6

  • 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 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://kuzutuzo.ru/strik?utm_term=does+burger+king+serve+breakfast+all+day PDF link annotation
    • http://bapatavusirave.mygamesonline.org/varobovuno.pdfIn PDF document text
    • http://umkatrade.ru/livre_guide_du_routard_philippinesvkecd.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/24672925337.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/iVIYfhd/lupodudevumupofevik.pdfIn PDF document text
    • https://cdn.sqhk.co/mafulavet/iPvIgdd/xbox_360_wireless_earphones.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/18968094556.pdfIn PDF document text
    • http://trudogoliya.online/vurupowonuka8kzt8.pdfIn PDF document text
    • https://cdn.sqhk.co/fidegelotag/G7gvKjc/c2_the_binomial_theorem_worksheet_c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://814bd5e1-0b6f-40f8-b2e9-6ab0015c5eef.filesusr.com/ugd/cc77ff_3a07f2cac4e94691a484bbb6503cf941.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_e48013b80b0f42579e2a5d6b8c5da26e.pdf?index=trueIn PDF document text
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_f966899b9e2249b980e726eddbd2ad3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/ivomec_classic_pour_on_data_sheet.pdfIn PDF document text
    • http://kemesid.onlinewebshop.net/black_bear_diner_application.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_b9f280492410412f95313282d7448a39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/kenolugegijenufenebebape.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_6a17656597df48b9aeb02b148387af63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/metal_gear_solid_3_online_2020.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_3f8a9663ef774a94992e827c16ed9623.pdf?index=trueIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_079a26f3be4448fca81a8368b2433522.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/sistema_endocrino_esta_formado.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_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 5440 bytes
SHA-256: 5f0d9278cf63e74cf1fbdd959ed054249daa03c8168fc8b327e7bc4a80930455
font_01_sfnt_off0000ff39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 11112 bytes
SHA-256: 098aabd4fbb9c8b78b6a95492a6a5aaeecb986331907ffde82b62b21c28724b5

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