Malicious PDF — malware analysis report

Static analysis result for SHA-256 282051a153425f84…

MALICIOUS

PDF

81.1 KB Created: 2021-03-15 23:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3584c91a823412db78c24549d5318282 SHA-1: 8551f585e0055ae0487dbd9d3bd67bfe59b0c472 SHA-256: 282051a153425f8419eaa0263bdc2ff5dc6c3aad013f85fcfc9c55baff013929
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-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/123?utm_term=well+received+with+thanks+for+your+information PDF link annotation
    • https://cdn.sqhk.co/letaziseb/aQhQTF2/kegazugepitifakowudi.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jfdgcpm/race_for_speed_traffic_car_speed_limit.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/jHaiaHr/fejekusologomekelokega.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/lg_tromm_washer_error_code_fe.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/1UhJuie/checklist_clipart_png.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/riwifezimaluxolepano.pdfIn PDF document text
    • http://hightrade.club/dark_souls_2_dlc_armorehzib.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/word_2016_keyboard_shortcuts_not_working.pdfIn PDF document text
    • http://genusadnlo.space/human_atlas_anatomy_2020_apk5ckna.pdfIn PDF document text
    • http://tersq.fun/15385156475r7xco.pdfIn PDF document text
    • http://1s.london/nomusuvutufigajawidetu7dt7x.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/igijdge/zimimipufilakudejokep.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/fSx49ig/pinabeperumokova.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/probabilidad_y_estadistica_bachillerato.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/ctghEwy/best_free_streaming_apps_for_android_tv_box.pdfIn PDF document text
    • http://shopsupergood.site/pabilesogojufikugakota08di9.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/1527d4db-ea0c-442e-9a81-11576ac48fdc/what_to_write_in_card_for_coworker_death_in_family.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ac543b-ea28-404f-bd6d-45c624f7fbac/unravel_me_lyrics_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8347ec-c4b1-4c1a-b998-ed416cfa5509/53310547710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591894fa-f7d7-486e-8019-496ab90af129/how_to_use_magic_mouse_2.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_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 5592 bytes
SHA-256: 05d4da36c334acd5e38e4e1260f1a34f0865406900ace8b3e7aaa0570a021404
font_01_sfnt_off00010f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9F 11580 bytes
SHA-256: 61e4985675009c2ca1a3444962df019b590b5eec8b5ad3bfe536cd09b3bc4db2

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