Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e47120843b43816…

MALICIOUS

PDF

78.7 KB Created: 2021-04-18 18:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: eaed468290e40108c84034724fb4867f SHA-1: 8ee5ab83e03eccd6f14a7ed6eb09f43d2cd58f81 SHA-256: 3e47120843b4381610a256581a017742f521855e6a42354b1afd5472edae1966
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to 'dugedepap.ru', a domain flagged for malicious activity. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=is+percy+jackson+a+disney+character PDF link annotation
    • http://wupevijijoze.mygamesonline.org/13654408529.pdfIn PDF document text
    • http://espaceabone.com/compressed_sheet_mask_diysfila.pdfIn PDF document text
    • http://itanto.space/what_is_non_hydrogenated_vegetable_oilffj2l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5fd204a856885.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/how_to_use_houses_in_monopolyib4bm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453719/normal_5fced8833aa31.pdfIn PDF document text
    • http://ecoterritory.store/how_to_prepare_for_cogat_2nd_gradecvgmt.pdfIn PDF document text
    • http://totalcreditreport.info/chinese_new_video_songv2zsz.pdfIn PDF document text
    • http://topplafond.xyz/persona_5_test_answers_eurogamerafjyy.pdfIn PDF document text
    • http://yourlivehelp.com/59015670168wnn7t.pdfIn PDF document text
    • http://uspeh.icu/jusuzaxadepobfa4j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403954/normal_5fe27ca8453c4.pdfIn PDF document text
    • http://austritkfa.com/3533481279q7gfy.pdfIn PDF document text
    • http://podarokinsta.site/maintenance_worksheets_freesoz98.pdfIn PDF document text
    • http://santecmb-sarl.com/math_textbook_grade_2i2v6o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/41262282561.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/38545751209.pdfIn PDF document text
    • http://nofolimuri.myartsonline.com/learning_astronomy_by_doing_astronomy.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/vebikal.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/40263365017.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/3856049673.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/92047785316.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_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 5308 bytes
SHA-256: 97c21455f7258aba2f1636a7b4b440bb5181709a1940b55a73ca0ba1b6ce8672
font_01_sfnt_off00010581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10581 11708 bytes
SHA-256: 380e821720ea440b59ccb707fda202d6fccb14d84afc49c93d57e0e184870cf1

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