Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c8c02c048a9216…

MALICIOUS

PDF

81.3 KB Created: 2021-03-24 16:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 448267a08ec01ee1050ea6cb7a541c5c SHA-1: dbe0e3279efd973ffc556d2441418366f156a569 SHA-256: c0c8c02c048a92168a52c8740471f53a0af81c3e9a3bd2b00e253ce5fe0caa2b
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or scam campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=worksheets+to+improve+concentration+pdf PDF link annotation
    • https://cdn.sqhk.co/wepiwojeta/haiejdi/45732821428.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/hcggHie/charades_ideas_for_teens.pdfIn PDF document text
    • http://morpeoplelife.ru/columbia_university_brand_guidelinesaexyz.pdfIn PDF document text
    • http://besefobusim.mypressonline.com/ladotedetopajanuzuxini.pdfIn PDF document text
    • http://lulaterunudagob.iblogger.org/beethoven_piano_sonatas_score.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/89323426070rr2nv.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/marginal_costing_examples.pdfIn PDF document text
    • http://simcars.ru/tijigubarigutibebesogui5c.pdfIn PDF document text
    • http://rikeropovi.22web.org/what_type_of_oil_does_a_2016_chevy_malibu_take.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/jazz_guitar_lesson_book.pdfIn PDF document text
    • http://damvglaz6.xyz/wijozakenikeeuso9.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/Tafric3/86741781055.pdfIn PDF document text
    • http://groshyk.site/urban_arcana28y33.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/jMhgzid/arcades_with_iphone_claw_machines_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/Yjchjjg/57228777833.pdfIn PDF document text
    • http://torchland.xyz/siletopijigudofimowz89lr.pdfIn PDF document text
    • https://cdn.sqhk.co/bubuzibiv/rmihYif/temple_run_2_download_play_store.pdfIn PDF document text
    • http://vuzuwul.getenjoyment.net/prepositions_and_adverbial_particles_heaton.pdfIn PDF document text
    • http://supportcopyright.net/adventism_in_zambiarifsh.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/fXnheji/tizemawikoful.pdfIn PDF document text
    • http://vnatural.space/vikokuredikenivobed4x.pdfIn PDF document text
    • http://phillipen.online/how_to_know_what_intermolecular_forces_are_presentn7gg1.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/hfgjdhj/wwe_champions_farming_guide_2020.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
    • http://vofabij.epizy.com/roku_xd_specs.pdfIn PDF document text
    • http://livikunaxexo.rf.gd/52599772544.pdfIn PDF document text
    • http://vidoniwofunevan.onlinewebshop.net/jipakud.pdfIn PDF document text
    • http://zudavowopo.epizy.com/32063881916.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_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 5288 bytes
SHA-256: c3d6cf6b1ec9f0b04b0f78766bc2acd9c8ff8a71bee4f51b4c6428763993f5a6
font_01_sfnt_off0001053b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 10308 bytes
SHA-256: dac5ae1360aecadf131fcd5173b3b16a8a34c8ae583271fdedf1904b36d4e860
font_02_sfnt_off00012884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12884 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34