Malicious PDF — malware analysis report

Static analysis result for SHA-256 643c5c4ee4e3cf94…

MALICIOUS

PDF

65.2 KB Created: 2021-04-05 11:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8b216ed33ea1669054a9b1dd8d537413 SHA-1: 5d07d63f6a82b7e5719140f5f1669a1aaee0fec8 SHA-256: 643c5c4ee4e3cf94ade235a5ca127cbfdddc5e352e6100c13525e8c079dedb26
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 0.9998

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://soxebez.ru/strik?utm_term=beloved+free+full+movie PDF link annotation
    • http://teachost.com/2019_lexus_es_350_leasehackrzn8qp.pdfIn PDF document text
    • http://losinglotterynumbers.com/13097005049g5jjr.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/ripokepataled.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/5997499.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/gjyunyv/behringer_mic_500_usb_manual.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/fawifujidasele.pdfIn PDF document text
    • http://kkkirrreeee.space/painting_cabinets_without_sanding_or_primingcj0ak.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/eSgghcb/anime_pro_color_by_number_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/fSljhhc/flat_pack_kitchen_cabinets_perth.pdfIn PDF document text
    • http://bolipoloweda.mygamesonline.org/diccionario_biblico_hebreo_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/ojFhhge/notifowovuxukofog.pdfIn PDF document text
    • http://dulisakip.medianewsonline.com/addition_of_fractions_worksheets_with_answers.pdfIn PDF document text
    • http://qqkaxes.xyz/paypal_credit_payment_planu1mwf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/23839944131.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/79571906879.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/what_is_new_to_netflix_in_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63d97f3-4ada-4654-8b77-ce3d8765139d/schlage_camelot_satin_nickel_entry_door_handle_set_with_accent_door_lever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7249b549-4b50-42a5-9a44-0e672a70e964/what_watch_does_babish_wear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a52b1b-0d2e-4579-a513-503fa89e569f/degizitetowanefipamaduge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a9fd6c-bcde-4ebc-a27c-65c86dce3be5/12453040508.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_off0000c3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DC 4776 bytes
SHA-256: 9672dafab956bde47ed5a6be2a1494b9f52ea75ba0ff5314dd0e0fc39a2ab0b2
font_01_sfnt_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 10864 bytes
SHA-256: 29e5bc6e39b55bb573c863bcd0b9fbb2113578457ab9bc8a465f77b04160323c

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