Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d148834bcfd70a…

MALICIOUS

PDF

75.0 KB Created: 2021-03-17 17:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3fd02cd23c208e4a5bcb57d74818d0bf SHA-1: 5a8bfe895147225c61923e4d61a207088b0c43b2 SHA-256: 86d148834bcfd70a78852af0f3ae19660f6c7340a1a0b9ed637586248d858c8f
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 0.9960

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://botokaw.ru/123?utm_term=reject+interview+email+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460682/normal_60106a1daf6b5.pdfIn PDF document text
    • https://kodepifaz.weebly.com/uploads/1/3/4/7/134705681/7278531.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/81760312163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374843/normal_5ff3b08ed5ac2.pdfIn PDF document text
    • https://taxezuwijukiwum.weebly.com/uploads/1/3/1/6/131606901/6174215.pdfIn PDF document text
    • http://vodoroding.info/xenoverse_2_female_majin_buildlf33j.pdfIn PDF document text
    • http://goloszauniver.fun/powerpoint_chart_templates_free75hs7.pdfIn PDF document text
    • http://cashbackk.site/what_soda_to_mix_with_apple_crown_royalh5zt9.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/gfQqJJp/blue_plastic_barrel_drums_for_sale.pdfIn PDF document text
    • http://sodahq.pro/jifubozogunojr157.pdfIn PDF document text
    • http://liketime.online/plan_de_estudio_de_la_biblian2q3i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_601dbe87aa215.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/BhdKRb9/cute_anime_girl_with_white_hair.pdfIn PDF document text
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/6205718.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/jigc9je/jabra_sound_app_windows.pdfIn PDF document text
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/xoverev.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/40740262754.pdfIn PDF document text
    • http://playmarket-online.com/242331331650akji.pdfIn PDF document text
    • http://ashotik.space/car_alternator_wiring_diagramtw19u.pdfIn PDF document text
    • http://usesucre.pro/62972138908uz775.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/kifelijozo.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/pWDzrMM/43533828841.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405650/normal_6001f1cf1948c.pdfIn PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/072a740c9f.pdfIn PDF document text
    • http://noverst.xyz/nonlinear_functional_analysis_and_its_applications_zeidler1vuhh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_602ac2d5c19ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 5136 bytes
SHA-256: a42c3bfbb37f848a72a1846d30a9d962ea14c86a480249b8422b1ff95c321f43
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 10644 bytes
SHA-256: d9a7ab9245fc30d87d9afa9fa3a08d871159eda8a463d6ce0a7456d336bfaa15