Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6ea86e00f0e6ec…

MALICIOUS

PDF

87.0 KB Created: 2021-03-30 09:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bbd2e35c6f0903fe7c898e328eeed5f9 SHA-1: da93bee13c79e1eecf02badab82b33e9f6530beb SHA-256: 7e6ea86e00f0e6ec87d7912f2df4a191b1254758f704a94512ccb849803dd717
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://leonvi.ru/123?utm_term=activation+icon+android PDF link annotation
    • http://lenuvivureropi.scienceontheweb.net/net_core_interview_questions_for_5_years_experience.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_5fe363b6bdea9.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/1154548781.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/74046906070.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/kawumezunizovozifajaxaber.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fe5667e46378.pdfIn PDF document text
    • http://rivokalodusi.sportsontheweb.net/bienestar_emocional_osho.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/71825965126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_605d3ca4a229c.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/doing_bayesian_data_analysis_2nd_edition.pdfIn PDF document text
    • http://sazulido.medianewsonline.com/why_is_my_video_player_screen_green.pdfIn PDF document text
    • http://jonebosu.mywebcommunity.org/koxegoderebut.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/gi1uThc/dinosaur_wallpaper_peel_and_stick.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/types_of_cattle_breeds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_600e620a465d0.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/jyhhpih/prayer_of_azariah_in_the_bible.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/54410344922.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/gjdxifY/home_network_switch_before_router.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davinawoguzag.atwebpages.com/what_are_some_core_strength_exercises.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/safety_can_express_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/irony_in_romeo_and_juliet_act_1_scene_5.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/wozitunenalekad.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_off00011ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC8 4772 bytes
SHA-256: 85fd79650858d53ae71c3efd12f30979e10a2ff24dffd4a547094323c32f0a09
font_01_sfnt_off00012b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B18 10744 bytes
SHA-256: 318feef2b3c811c4bfb37b634aed1317ff259ebc156afa8e71c610c9d757c578

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