Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e26f87cc1b601ec…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 19:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3e5184ac55417bcdc47d90e5d4c2c63d SHA-1: a618db42edf623559edf6ca080ea020b980b8868 SHA-256: 2e26f87cc1b601ec732c9ec546b197e83db4fc3f6b0a6f72bc074ef19e1c12a9
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malicious redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to trick users into visiting potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://golowaki.ru/strik?utm_term=zip+code+map+staten+island+new+york PDF link annotation
    • https://cdn.sqhk.co/resozasevej/fjhfqie/paypal_account_set_up.pdfIn PDF document text
    • http://watertea.space/o_show_do_eu_completoz92zg.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/zojidezuta.pdfIn PDF document text
    • http://russianstravel.ru/how_long_is_a_court_of_wings_and_ruin0931t.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/24144470191ody6r.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/1njhTgd/96100401454.pdfIn PDF document text
    • http://libertinemodels.com/new_holland_tc30_manualeaql5.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/5gcjejd/65017999976.pdfIn PDF document text
    • http://getyourcredit.info/how_to_clean_mold_out_of_my_little_steamer5ygf8.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/Tehdjj9/50162897315.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/jilozakaganorurewinav.pdfIn PDF document text
    • http://9gusevshop.website/photo_collage_editor_online_free_downloadx3vub.pdfIn PDF document text
    • http://maska-respirator.com/caldwell_precision_chronograph_manualsd3qd.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/chilton_repair_manual_download.pdfIn PDF document text
    • http://penageli.getenjoyment.net/do_tattoos_fade_away.pdfIn PDF document text
    • http://magicwoolshop.com/small_baby_smile_imagesc0pq4.pdfIn PDF document text
    • http://hq-cleartv.info/zifofaleviponiri873lf.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/hbXgdYE/dofuwifam.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/554d84ac-cfbb-42de-9d6e-143dc149ce57/dasawulevi.pdfIn PDF document text
    • http://wujagenak.atwebpages.com/brochure_design_templates.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/neumonia_signos_y_sintomas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f6f359-3b21-47fe-96a6-aacfa397f9e9/beripowanipe.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_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 5432 bytes
SHA-256: 158a0662641b658be2f174a62d71a35f9d54a4d3b439d5b8579e1ae62080604f
font_01_sfnt_off0001087f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087F 10868 bytes
SHA-256: 8800faa5bbe02eb69c193a2a35931d901e83ae7b68c16ea03c44347134d5576b

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