Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4362471ebe4e637…

MALICIOUS

PDF

81.3 KB Created: 2021-02-08 06:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e79e6eeca81c2bf2f66372cb522aa49a SHA-1: 24111623d7ce108421f7cdf1173ba99d664d0933 SHA-256: b4362471ebe4e6378f6bc5f189808d9e3a94eb8978aea4b34c48314affc88358
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://seumenha.ru/wb?keyword=civ%204%20whipping%20guide PDF link annotation
    • https://cdn.sqhk.co/jetirivotu/SiihjJ0/the_archers_2_crafting.pdfIn PDF document text
    • http://peregukejipesa.iblogger.org/present_simple_tense_worksheet_for_grade_3.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/dyZEhhR/melife.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/2595314.pdfIn PDF document text
    • http://zobebukore.22web.org/counter_strike_1._6_internet_servers.pdfIn PDF document text
    • http://natural-shop.info/92200463260yi8c1.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/gg5asjc/sejosevusagababuxama.pdfIn PDF document text
    • http://musofiron.ru/82257562029i0h46.pdfIn PDF document text
    • http://telemprom.xyz/python_programming_for_hackers_and_pentesterszsj68.pdfIn PDF document text
    • http://xekizarobofoza.22web.org/57029914058.pdfIn PDF document text
    • http://quickstore.pro/lake_street_dive_side_pony_torrentssjeq.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/F1idhfZ/tiny_house_homeless_village_austin.pdfIn PDF document text
    • http://evakuator-uga.ru/jigenanah3lgz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://todubina.epizy.com/bet365_mobile_apps.pdfIn PDF document text
    • http://sijopar.epizy.com/nepetoperokugoga.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/guided_meditation_for_pain_relief_and_sleep.pdfIn PDF document text
    • http://zinebozozapi.rf.gd/information_asymmetry_market_failure.pdfIn PDF document text
    • http://joxumokuri.epizy.com/amd_graphics_card_for_laptop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 4660 bytes
SHA-256: 7fdc681bbc8d4eedaff54939491243f0a33e042c473b3ab75b6437cc8cc9b92d
font_01_sfnt_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 11020 bytes
SHA-256: 5c9421a6f47aa9827925f82654f9fd08b47294927dfb0735c5880cc45ada23ac
font_02_sfnt_off000129a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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