Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b9d9031ee3d3e8…

MALICIOUS

PDF

78.0 KB Created: 2021-03-12 02:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4e79bccea82c30624f88d66e131d608e SHA-1: db28f4e90e5269ebe9977e6dbfcd2daf3baae7f7 SHA-256: c2b9d9031ee3d3e8263d7d8bc4ff8e38ca0f38e437206d5c4e17ad38010952d9
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://jottigo.ru/strik?utm_term=modo+de+produccion+asiatico+a%25C3%25B1o PDF link annotation
    • https://cdn.sqhk.co/wuvevevef/JlPeGgg/7571849225.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/does_stock_market_open_on_memorial_day.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/jjOz4ig/best_hoverboard_in_subway_surfers_2020.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/asus_maximus_iv_extreme-z_bios_update.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416786/normal_5fcae55eb417d.pdfIn PDF document text
    • http://jofipifemu.medianewsonline.com/kicker_hideaway_not_working.pdfIn PDF document text
    • http://zefefiwova.medianewsonline.com/niwaluwanegarafozigamagi.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/VagSXgi/skyrim_seeking_disclosure_dragon_scroll_location.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465907/normal_5fd5f01e0f189.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/nOfhcjg/alienware_gaming_mouse_and_keyboard.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/how_did_agricultural_revolution_change_peoples_lives.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/ijegnhh/lamedika.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/jaieWU9/31541295655.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/6id2eIB/xefedebopipafoki.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/x4hgYij/radio_red_online_mexico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c674dab3-f022-41cd-b281-34f14fdc58d4/introduction_to_biblical_interpretation_-_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8481a042-e782-4ee1-b27c-7cd731d5e2b1/jenn_air_convection_oven_replacement_parts.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/43235539960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659cb32a-83d1-49a9-8f2e-1cab180b159e/twilight_full_movie_in_hindi_part_1_download_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7117c99b-6d20-44a9-92d2-85f158b38abe/94773327143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e268c28-2239-4e67-a417-2f270ffe6606/amplificador_crown_xti_2000_especificaciones.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_off0000f068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 5252 bytes
SHA-256: a76060c092b18a3cb5f356e4532eb7fbd229569414d27700213bba76162c76d9
font_01_sfnt_off00010216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 11880 bytes
SHA-256: 8007cba44e7ac28b8b2b2e3559f0cb48b5ec8254510536af407847865879de90

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