Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd04c925f01a580…

MALICIOUS

PDF

82.8 KB Created: 2021-06-12 13:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 14aac840a326fedd779d941d9c87abd0 SHA-1: e1b9bdc913a0bb8dd3118e5e5b1e14c53feef0f8 SHA-256: bbd04c925f01a58015b5f6d9506133114d22f94d7a7cd9f6f44d4f6360df606d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs, such as 'https://ketchas.ru/pbw?utm_term=holt+and+holt+net+worth', likely serve as lures to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ketchas.ru/pbw?utm_term=holt+and+holt+net+worth PDF link annotation
    • https://xomixowabegela.weebly.com/uploads/1/3/4/6/134694161/5470259.pdfIn PDF document text
    • https://relulime.weebly.com/uploads/1/3/4/3/134384492/dbdb1bd.pdfIn PDF document text
    • https://fujireroxilurig.weebly.com/uploads/1/3/4/6/134649353/xijemaxa.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/defemopor.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/12558e4afb1233.pdfIn PDF document text
    • https://wabatopopelak.weebly.com/uploads/1/3/0/7/130775953/4297439.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454426/normal_5ff927cf328e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_6064da14ed76b.pdfIn PDF document text
    • https://tepikibinaf.weebly.com/uploads/1/3/2/3/132303010/diduwapipekimub.pdfIn PDF document text
    • https://fupodakabapamom.weebly.com/uploads/1/3/4/4/134489617/powato.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4479214/normal_60b59b155dc1a.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/95a5c638-2a97-4210-bdd8-2dcb9d93bea8/carrom_pool_hack_mod_apk_unlimited_coins_and_gems_download.pdfIn PDF document text
    • http://kutegazez.pbworks.com/f/ruxokoxufowofeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46664c9-f814-40ea-ab9a-2f8e6ab4fe97/peoples_sexiest_man_alive_2020_list.pdfIn PDF document text
    • http://pudamalulera.pbworks.com/w/file/fetch/144542712/pokemon_in_hindi_season_13_episode_35.pdfIn PDF document text
    • http://lipemuv.pbworks.com/w/file/fetch/145019703/algo_8180_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91af832c-7adf-4231-af92-23572bd23689/harry_potter_book_6_chapter_26.pdfIn PDF document text
    • http://simaduwu.pbworks.com/w/file/fetch/144841866/akuapem_poloo_trending_video.pdfIn PDF document text
    • http://refarumiba.pbworks.com/f/how_to_view_saved_passwords_on_android.pdfIn PDF document text
    • http://gezibilivun.pbworks.com/w/file/fetch/144834246/wunasosejopujogozuluv.pdfIn PDF document text
    • http://zigunef.pbworks.com/w/file/fetch/144443406/cdigo_internacional_de_nomenclatura_zoolgica_iczn.pdfIn PDF document text
    • http://daridameku.pbworks.com/f/jijurapuben.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_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 4788 bytes
SHA-256: 6026a42741d40efa9606deef9dd6519339b4c8264976ccf7fecbc3f4853d375d
font_01_sfnt_off0001168e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168E 11948 bytes
SHA-256: b6a27fa376564b5f07e214d2ab3b00e37f845ba3d71bb26126dc317d879d3809