Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada9b2614834f164…

MALICIOUS

PDF

77.8 KB Created: 2021-03-17 00:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e5616d8454b994b7591ddf56fa410a2 SHA-1: 24eb9fb09b38422f9b73d9645fe94d916deeaa2d SHA-256: ada9b2614834f1644bd1585b49cefab7801368c84f62ad748d5cdcb87b628c6c
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 0.9994

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://xajibur.ru/wix?keyword=kfc+menu+phils PDF link annotation
    • http://magowowir.iblogger.org/gecko_spa_pack_error_codes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403816/normal_5ff1dbad50c3a.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/jajihho/wukowimogoxiz.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/debasekubemapox-fevonedu-teval-maxelixi.pdfIn PDF document text
    • http://bodikakib.22web.org/dedham_ma_accident_report.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/cEsG2qA/crashlands_2_player.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/foje4BQ/carromco_fire_v_ice_air_hockey_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_603b93b2f15d8.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/jftDVhg/30460663121.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_600138ae92350.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/e9e4a080653b.pdfIn PDF document text
    • http://paxawujaxoda.22web.org/us_passport_renewal_minor_application_form.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/8198414.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/a8513402-696a-45c9-88db-9cb9bb6e1245/can_a_lutheran_pastor_perform_a_wedding_ceremony_outside_of_a_church.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0cdc8b0-61b6-4093-9530-4d3d708ec1cd/sanokabogiko.pdfIn PDF document text
    • http://ronaxunejononot.rf.gd/abhishekam_movie_songs_free_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edb5dfa-0051-4cda-b7b6-f9ad246c0d45/15639117655.pdfIn PDF document text
    • http://posexafose.epizy.com/5342177476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a625d2-6507-4547-80e9-42ae9fd2634f/268623748.pdfIn PDF document text
    • http://tudemofexurujen.epizy.com/61512654404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd084e70-de28-4b97-a413-a2319522bdf2/60073361146.pdfIn PDF document text
    • http://datufubizut.rf.gd/confidential_informant_list_arkansas.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_off0000e709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE709 4612 bytes
SHA-256: 2f369c78a7b4884df0fc157cf082d5d863c7b473e69b37db91d2a440646c8ae0
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 11028 bytes
SHA-256: d6722f08e126d520b5a353827909becbabd385e881151eb2d3442f8eb6a9c12b
font_02_sfnt_off00011b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176