Malicious PDF — malware analysis report

Static analysis result for SHA-256 92935664a6594a23…

MALICIOUS

PDF

77.9 KB Created: 2021-03-26 07:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 42c7450b5acab69f60f2c249215e1e32 SHA-1: e9d7449d1475e7d7851270f6bf037960281867ac SHA-256: 92935664a6594a23bdc3273055650320a9e40a28fa58751a83ca14fee40c5910
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest a lure for downloading applications, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=little+nightmares+apk+para+android PDF link annotation
    • https://cdn.sqhk.co/sesekopusoj/agfgdhd/way_to_sharpen_chainsaw.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/iabjaoF/parkour_flight_2_download.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/origen_del_nervio_vago.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/musab.pdfIn PDF document text
    • https://cdn.sqhk.co/tekemozuj/UKgcAbA/buzizopowob.pdfIn PDF document text
    • https://cdn.sqhk.co/mejeteboxav/dKwNeja/emoji_lock_screen_pattern_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_604ceb686d0a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478927/normal_5ff5bb321556e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447626/normal_603a626faa231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_600f4ee431cb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487208/normal_5ff861bb89c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406777/normal_601771e78c84a.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/jdfjijd/ball_sort_puzzle_level_111_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/hcjbHja/map_among_us_skinpack_mod_1._14.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/idcdQgg/opal_transfer_money_transfer_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5fd97f5d85a78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5ff8927537ff4.pdfIn PDF document text
    • https://cdn.sqhk.co/nemizuxe/GPiajck/bechdel_fun_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5ff98748b4dda.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/latitude_longitude_worksheet.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/9d509ae2-db06-44b7-b8ae-4579ee7fe41e/how_do_i_know_if_my_ignition_coils_are_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b84172-f537-4bbf-bd29-3ebe46dbde65/33225646172.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/59856538679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1a0ded-ba69-43b4-8ed2-0b654ed52793/x-men_the_last_stand_official_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08beac3-eee7-4305-9a23-01c4559e9abb/comprehensive_english-yiddish_dictionary_online.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_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 5380 bytes
SHA-256: e3a0649c25e3009ab31c4ce6c0320072f99370bb650429a26c1fd19e8f258cdf
font_01_sfnt_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 10912 bytes
SHA-256: 84dc66031c7751308a97593e7966ad9db2f77daa61dbe36d104c22ae4951caf1