Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ed2ad89226a284…

MALICIOUS

PDF

98.9 KB Created: 2021-03-16 04:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b8e2726096c7e68db03f89e800e4563b SHA-1: 7a43bef549a7ece142450167c554267820fcc117 SHA-256: f8ed2ad89226a2842de2dd2585b5512b70ee259a53c330974887a6af050ef938
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or potentially malicious domains, suggesting a link farm designed to redirect users to harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a deceptive web presence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/award?keyword=council+of+constantinople+pdf PDF link annotation
    • https://ladubikoniku.weebly.com/uploads/1/3/0/9/130969526/7957989.pdfIn PDF document text
    • http://lalashoppen.online/raxomek28xe.pdfIn PDF document text
    • http://reduslim-eu.site/tizumovufodofunereniraziwz7an1.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/2439533.pdfIn PDF document text
    • https://zopokobo.weebly.com/uploads/1/3/1/3/131383813/4167736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_60496db3bf792.pdfIn PDF document text
    • https://cdn.sqhk.co/tabakotodi/uighbe8/360_antivirus_app_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_601796428bc13.pdfIn PDF document text
    • http://wordsideget.top/44885418081d3xuu.pdfIn PDF document text
    • https://cdn.sqhk.co/mafulavet/4YiieOA/bugs_bunny_eating_carrot_animated.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ifhiegd/pivesijug.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/8f3f0b0d043.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/exercices_sur_le_verbe_etre_et_avoir.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/gh7iijb/angelo_s_soccer_corner_harrisburg_pa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5febfe351dde3.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/856c981e613f.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/gjAhihd/mountain_bike_races_near_me_2021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5fd12e173abaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikaderobiw.atwebpages.com/artemis_fowl_2020_filmweb.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/dunkin_donuts_chai_oatmilk_latte_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/medipovebarejana.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_off00013e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E44 4960 bytes
SHA-256: 81d049031b8eb3b469298d90f86e453bfb162ab379e17f89786de12b51807f03
font_01_sfnt_off00014f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3B 14516 bytes
SHA-256: a1e6669f80db23421ea560632b17dcf1b7aa62570b0abdc587172afcc44fb367

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