Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ece3e93a8ce607…

MALICIOUS

PDF

91.1 KB Created: 2021-06-05 23:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9f389b007a711fb88a35ad4b00ed6266 SHA-1: f0eae8490b7fe5efe3146141d48da2fc6650c709 SHA-256: f4ece3e93a8ce6074ed687ccbed0c6892bab55f2e0df366dd9da42ce5b3aae8a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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://ponafet.ru/123?utm_term=fifa+world+cup+song PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470401/normal_5ff0287112066.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5ff25da1d6079.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fdd42f403ed0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5ff4df884fd5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_605183cfa6bd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_6041b685e39cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487416/normal_5fddaef8933bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495839/normal_605d1bacec355.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/504387f3-233d-4861-84f5-a502a3ff2cb6/89655074316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85093d50-f1b8-41b2-a199-2a06b8cce0c9/tureripoxasufowova.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/how_to_calculate_the_degree_of_financial_leverage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d28cbfe-9abe-46f9-9bf7-1deec1cce980/31021981840.pdfIn PDF document text
    • http://siwuromo.pbworks.com/w/file/fetch/144678177/quais_so_as_sries_do_ensino_fundamental_2.pdfIn PDF document text
    • http://jufugoxula.pbworks.com/f/kasinidebadabegukawivad.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/gifovozulutirakusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70475f58-4ea9-48f9-bee5-1719bc4b91d4/example_of_job_description_and_specification.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/w/file/fetch/144509055/jigabo.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/14279221392.pdfIn PDF document text
    • http://nigezid.pbworks.com/w/file/fetch/144423516/ammo_49_dl_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c20826-14db-48e1-9d9b-76238ebae7b3/black_and_decker_le750_vs_le760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453543f2-1b7c-4122-b1c3-db7704916da6/heavier_than_heaven_audiobook.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/7036509224.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/adobe_premiere_pro_2020_download_free_full_version_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c0c13b-11da-4022-946c-3dcdd1b351ad/why_is_my_washer_not_draining_all_the_way.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02255a3-6570-4867-8606-07a2bc112672/bfme_1_1.06_patch_nasl_yaplr.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_off000122c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C9 5372 bytes
SHA-256: 28cba3e2432082822481ba4c9be5b99f2f8f94fa45f747b31ec18583ade55b60
font_01_sfnt_off00013533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13533 12104 bytes
SHA-256: 8cc2e3ef907e9b84da1276028d791276fe58c450f63a5080f68e95601f2beb7d