Malicious PDF — malware analysis report

Static analysis result for SHA-256 529ba25d4a49fa44…

MALICIOUS

PDF

79.9 KB Created: 2021-03-17 18:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f70a1f2d8612387fa9a9f4f376604cf5 SHA-1: 1905b66b61f93311b05fbd969db21b89d918e81c SHA-256: 529ba25d4a49fa44b8bc556c18cf423d0a24d40ebfc1aed99428c77d8f7b4e44
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 0.9957

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://resalured.ru/strik?utm_term=does+snapchat+work+with+law+enforcement PDF link annotation
    • https://cdn.sqhk.co/sijaxovada/itjhjvb/79267688174.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/asbabun_nuzul_indonesia.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/jjibRf1/zovopumalilotozuxajizin.pdfIn PDF document text
    • http://wegansit.space/xusitejeji9msl0.pdfIn PDF document text
    • http://2220202.ru/kobalt_10_mitre_saw_reviewufrl3.pdfIn PDF document text
    • https://cdn.sqhk.co/pelebitebi/mtZhghe/candies_and_curses_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/hgjbcxE/85214413058.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/DRgebI7/72906341729.pdfIn PDF document text
    • http://trikotoria.ru/lolifubigolijinuwupumlops.pdfIn PDF document text
    • http://uber-global.com/rikiwesizamigafowuper8evs8.pdfIn PDF document text
    • http://teenagetutor.net/kapunikea0u6t.pdfIn PDF document text
    • http://iminn.ru/vba_code_for_converting_to_exceleaj0t.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/how_to_turn_on_ipega_controller.pdfIn PDF document text
    • http://community-day.ru/33423828421lxjyq.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/giamgfZ/minecraft_pe_beta_seeds_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/hiFibU7/jump_ball_man.pdfIn PDF document text
    • http://funseeds.site/641672322817gz25.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/regupuvadotabipiw.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/1hiajca/wonawobaramamulimezu.pdfIn PDF document text
    • http://reactivascotia2020.com/gethsemane_song_lds_sheet_musicnaqr0.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/Ijdicge/rubufel.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/296ea39d-2877-49e3-9389-a30b40c08d1a/wisogaxexu.pdfIn PDF document text
    • http://gavofime.atwebpages.com/fuzuzidader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe80ee60-4385-415d-b072-23d1c67e748d/24566731165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cff976-04a6-4807-998d-baa7a4160b87/jezisejuzitamezilev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1cfe9e-a9f0-4a46-b5d2-2303385c872c/100_startups_to_watch_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7f53df-8b9c-4886-b68d-5a0ee2a151b3/62859712013.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_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 5408 bytes
SHA-256: eefea15fc54fbce1a8fdc1ccd0091d6a45fbd740ff5045bb50b19664d1a92f38
font_01_sfnt_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 10780 bytes
SHA-256: 0ce1783e69dcb3b34f8bff19b8409ee78f3dbaa14f9b27cf76661427edda447a

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