Malicious PDF — malware analysis report

Static analysis result for SHA-256 5456600932b28d5c…

MALICIOUS

PDF

77.6 KB Created: 2021-04-05 09:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7f31877cb426b28f6fa692df18c1c1c3 SHA-1: e8cd0648d56ffb95db7e71b2beca382a8e243fbb SHA-256: 5456600932b28d5cd8eff6e63a74d4a161351842480c8337bb6cf7ff395e7cfe
186 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to direct users to various external websites, masquerading as search results. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous URLs indicate a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/aws?utm_term=which+engineering+is+best+scope+in+pakistan PDF link annotation
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/wejuratuwozu-luwopexurojew-wobikitozeva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469847/normal_5fef9bdc69ce0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_5fe5469477fc9.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/oEmuz1R/lodasubapifavumup.pdfIn PDF document text
    • https://lukafitujukeme.weebly.com/uploads/1/3/3/9/133997152/ce43c9c03eeb.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/dezepijugakuluvuxixu.pdfIn PDF document text
    • https://wiwunofubej.weebly.com/uploads/1/3/4/0/134012322/88fd38114a8cb47.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/VidMhep/vertigo_remedies_homeopathy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_60655b9c890d8.pdfIn PDF document text
    • https://xurugafidas.weebly.com/uploads/1/3/6/0/136081795/niditegizuxeti-sepemajewajiw-vomotapovawan.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/0651b844-74b8-43d8-97c1-cbc89be255a1/87128754059.pdfIn PDF document text
    • http://nijesetu.epizy.com/zatot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87fc89d-8aa0-4730-8ae5-23a0bf091a1b/watch_pride_and_prejudice_2005_online_with_english_subtitles_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ced3447-401e-40e7-a8c9-f91ce3f26cd1/fogepip.pdfIn PDF document text
    • http://wuluzakasuw.epizy.com/ethical_issues_in_social_work_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8ff498-bfef-4276-bafa-99295efefe1d/bokewotavawolojuzotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83b0cfc-d62e-41fd-b2e9-aabdfa9395b8/what_is_the_book_cinder_about.pdfIn PDF document text
    • http://dulefuzobov.rf.gd/jexufatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557fecbf-ccb4-4bcd-bc2c-db48928ca3bb/best_football_workout_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9febb2fa-6eb6-43b9-bc05-31ee11df8fb0/epson_v370_flatbed_scanner.pdfIn PDF document text
    • http://luvigewe.rf.gd/10089590619.pdfIn PDF document text
    • http://kesobiw.rf.gd/product_brochure_template.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_off0000f178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF178 5380 bytes
SHA-256: 0dcd7159997c795f012fc0bfc330e8582592cd0407603d797875abf407942cbd
font_01_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 10712 bytes
SHA-256: 55037415bcf2b7e8805710ad6ad88714bd71948299604346c6d0218ddeda4c0f