Malicious PDF — malware analysis report

Static analysis result for SHA-256 10264350efba2dce…

MALICIOUS

PDF

80.2 KB Created: 2021-03-19 23:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 241957411dadb53294f2d2c6e9ed9c8d SHA-1: ca1dfc40d5c4c36092ac4b6d9499729d8ddfe6e8 SHA-256: 10264350efba2dceabb60f760f9740ec44a2463811a6cee48177c1853fb01bc6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are consistent with attempts to redirect users to malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=pedal+power+2+plus+18v+cable PDF link annotation
    • http://freud.icu/best_dd_online_game67t4n.pdfIn PDF document text
    • http://sallles.ru/237736271797rouo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_603f1f60da26c.pdfIn PDF document text
    • http://natbeach.space/95537014495wp84t.pdfIn PDF document text
    • http://theraisins.pro/autodesk_autocad_2019_tutorialcaztr.pdfIn PDF document text
    • http://garobunatuxovi.scienceontheweb.net/44537663888.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/75916196860rv9li.pdfIn PDF document text
    • http://vashmaster.info/schwinn_airdyne_ad4_vintage_partsbwkm1.pdfIn PDF document text
    • http://playmarket-online.com/430526475736bxdl.pdfIn PDF document text
    • http://wunuxuvi.sportsontheweb.net/fudalebesoliwinenefup.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/dalewavexijolutiromiredok.pdfIn PDF document text
    • http://cg-designer.xyz/8_sentence_paragraphamn4b.pdfIn PDF document text
    • http://samozanyat.info/bose_soundbar_300_subwoofer_manuali8qsy.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/tiguwudusa.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/bird_table_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_601ab6aa43713.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/23281452817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d6a940-af62-4a72-8ad4-f6ad830d329f/spelljammer_ship_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0177f2d5-81ac-4bbd-b189-9ce93835d3ca/percy_jackson_the_lightning_thief_graphic_novel_free.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/adverbs_worksheet_grade_2.pdfIn PDF document text
    • http://jugomirusulove.atwebpages.com/anti_ragging_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f06cd0-c589-42a0-b7dc-cc7ad9d741ea/1061884550.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_off0000f775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF775 5736 bytes
SHA-256: bce809cb5912b2869a957183e210ee7ed62abd6bfe28fc1609671dfbdc56642a
font_01_sfnt_off00010b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1D 12040 bytes
SHA-256: e64897a1a8a0c4f50247815c435be2a22510402cf7abf118009cfef4cafc40b8

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