Malicious PDF — malware analysis report

Static analysis result for SHA-256 7234d481359d1d2a…

MALICIOUS

PDF

84.0 KB Created: 2021-04-26 13:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e2e5df34ce9811133a3eef6704df024e SHA-1: 1e4b519278d5f56474e1d8e8d16a0ae6b172890d SHA-256: 7234d481359d1d2a786ca47f561f1597dd2892ba3274e03ee329495810a334a0
126 Risk Score

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 0.9987

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://soxebez.ru/strik?utm_term=julian+date+code+converter+2020 PDF link annotation
    • http://uggi-ugg.com/5776792137i4iyh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_6026b41b7f2e0.pdfIn PDF document text
    • http://organic-ita.space/bhojpuri_movie_2019_hd_mp4o00iq.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/76723663116.pdfIn PDF document text
    • http://zanalurisof.22web.org/bapezinilatogutezideji.pdfIn PDF document text
    • http://raicen.com/polaroid_z2300_zink_paperv303i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473892/normal_6032c06229836.pdfIn PDF document text
    • http://findattime.com/eheim_auto_feeder_setupm8zp5.pdfIn PDF document text
    • http://gmetry.online/which_is_better_beats_studio_3_or_solo_pro0tu8z.pdfIn PDF document text
    • http://natiral.space/tililo07xrl.pdfIn PDF document text
    • http://mipexalazalekab.getenjoyment.net/bubipasebowoxenewavo.pdfIn PDF document text
    • http://goodnaturak.space/rafawitlvqw.pdfIn PDF document text
    • http://devumixik.iblogger.org/what_constitutes_working_class_uk.pdfIn PDF document text
    • http://podarokinsta.online/long_hair_beauty_princess_makeup_party_gamekveqb.pdfIn PDF document text
    • http://woronari.getenjoyment.net/bafukesakorapumumugukogu.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/6fab260f-bcfa-4716-aeb2-eaa8c128234a/2553487206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5b2c8f-48db-4b7b-a0c5-15c95c68bb54/2007_chevy_cobalt_repair_manual.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/how_to_calculate_ending_inventory_in_units.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890670f2-7c45-4501-87f8-d7f908d7d1ac/wixomejutotomoxegopu.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/fijovagenepusesobotetoma.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/jixomeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5cf439-3566-4168-97c8-1a6ae44e986c/zuwadag.pdfIn PDF document text
    • http://vojasokizew.epizy.com/83965606113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b88a11-7296-4c3f-ad53-b7418d0ce295/american_assassin_book_series_order.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_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 4960 bytes
SHA-256: 9429e08f3923ac18df7aa6517db320a80bce1b4b1ae1eb2bb549a9a6b4a0cd0d
font_01_sfnt_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 11376 bytes
SHA-256: 19d668c05520306fddb676e8534abd73d0b2fa25372c93a00235f83eb4d5b472
font_02_sfnt_off0001325c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176