Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d134f22e3c108be…

MALICIOUS

PDF

69.4 KB Created: 2021-05-16 19:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e13346ca29a3f7dcf9364ed1349389de SHA-1: 892e1b918372fc8fd60e82e5ec994b803bc16299 SHA-256: 8d134f22e3c108be5a018bd1bd3c43e1b17153c252a6435b44f9571b6672ab7a
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 0.9992

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://fokemale.ru/strik?utm_term=wahl+cordless+clippers+replacement+parts PDF link annotation
    • http://nafepuzemobir.sportsontheweb.net/30211510918.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/twilight_download_in_hindi.pdfIn PDF document text
    • http://fbcopyright-center.com/chegg_computer_organization_and_design_solutionsdfo4y.pdfIn PDF document text
    • http://atomyimperial.ru/5056442183k99bk.pdfIn PDF document text
    • https://cdn.sqhk.co/wofetewa/54Xpiea/supertanker_colorado_springs.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/ohdKPgd/tangled_the_series_varian_fanart.pdfIn PDF document text
    • http://mebelintera.ru/84909505620yt29q.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/fOhfdZk/battleship_game_template_printable.pdfIn PDF document text
    • http://svoylend.xyz/banting_diet_recipesxqs3o.pdfIn PDF document text
    • http://katermore.ru/antibacterial_activity_definitioni4ncd.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/igKlgiL/kovosami.pdfIn PDF document text
    • http://tehnotop.site/522037204568jke3.pdfIn PDF document text
    • http://universal-kirov.ru/2544700470085d1l.pdfIn PDF document text
    • http://merokomazojewi.scienceontheweb.net/mikurefadafesodadafu.pdfIn PDF document text
    • http://nikecortez.net/82951582160lfgx2.pdfIn PDF document text
    • http://picply.ru/35871688106uh87v.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
    • https://uploads.strikinglycdn.com/files/24384ebf-8e7d-48c8-bce5-17ee61915297/how_long_is_grieving_period.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2726a23-57aa-4e28-9388-c5ccd145aa14/edible_forest_gardens_vol_2_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54ea835-eb03-4a39-a92c-9b7864cef5f3/povowonisaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/childish_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/58905180371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd747d40-e930-483b-a734-84bef8bb88b2/tascam_dr-60d_mkii_timecode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64bdc164-24d5-479e-8bd6-21271ed32a47/instructor_solutions_manual_for_software_engineering_10th_edition.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_off0000c506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC506 5112 bytes
SHA-256: d7a8bac7735c59d609cc26f7bdb9a662057def42d64315bd5ae9ccc8aa9dbe64
font_01_sfnt_off0000d63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63D 9868 bytes
SHA-256: a8332a509a859b56e724a205a00ef9af14c56174196892d8ad7538a2e03378de
font_02_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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