Malicious PDF — malware analysis report

Static analysis result for SHA-256 6901924b3c7c6f8b…

MALICIOUS

PDF

70.6 KB Created: 2021-02-18 01:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 95fa93ce6cd88a134bbe8fe093ba3597 SHA-1: ca234b75e9f26cd203dd1700e261d1fc73cc3085 SHA-256: 6901924b3c7c6f8b12d84334093be5f5125f19d12030204a792c41a2eaa609eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/strik?utm_term=ruger+p95dc+accessories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412762/normal_6016c549d472e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373776/normal_5ff0dc2a5493f.pdfIn PDF document text
    • http://atomlinux.com/zufuxafanagosamajugil4fiyg.pdfIn PDF document text
    • http://tumbochka.space/burger_king_t_mobile_tuesday_code_not_working5ellk.pdfIn PDF document text
    • http://1xbet-football.fun/smashy_road_mod_apk_all_carsgyge2.pdfIn PDF document text
    • http://goshop32.site/punctuation_in_compound_complex_sentences8tz4o.pdfIn PDF document text
    • http://comforfemj.fun/barber_shop_close_to_me_nowihnrf.pdfIn PDF document text
    • http://meriline.store/vofekifedulokolukegimumefgib.pdfIn PDF document text
    • http://redita.fun/masterbuilt_electric_smoker_cooking_times_for_ribs5bjqw.pdfIn PDF document text
    • http://xudisoda.66ghz.com/excel_voltage_drop_calculator.pdfIn PDF document text
    • http://copyright-central-media.com/baixar_gta_san_andreas_para_pc_fracoz8ydn.pdfIn PDF document text
    • http://blankid.ru/51680992369xrc14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sosujogi.epizy.com/free_sengoku_basara_3_pc_games.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/tamilrockers_malayalam_full_movie.pdfIn PDF document text
    • http://gokixedotoj.epizy.com/mebekuxefovoledepabeme.pdfIn PDF document text
    • http://memokikadu.rf.gd/68787519401.pdfIn PDF document text
    • http://mugijuzes.epizy.com/av_malformation_brain_histology.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/lekitirarusegopeguj.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

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_off0000d45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45F 5496 bytes
SHA-256: cbbf91ca65a598b8fedd8bc2ab13b63155b01203adf8cfc625ded2db4c5cbede
font_01_sfnt_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 11304 bytes
SHA-256: 353b871e709769ded9a4c832126845e497034b302693e696d82b10c1e77c777e

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