Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde6e2cf4e88a15c…

MALICIOUS

PDF

89.7 KB Created: 2021-02-28 21:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2945ac812b11396131e0bcad11c89e8e SHA-1: 5208428874ab0c3689db6fb43b0425b6229c6b12 SHA-256: bde6e2cf4e88a15c0234c03842d7362c0bcbf77197c819f4ffb7793c906ac2d3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary one pointing to 'dugedepap.ru'. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=what%2527s+the+best+song+to+dance+to PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391649/normal_603000658faa1.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/igijfih/58496192283.pdfIn PDF document text
    • http://slimerecipe.org/90857745060ikkvx.pdfIn PDF document text
    • http://ionatr.fun/despacito_alto_sax_sheet_music_easywtpsm.pdfIn PDF document text
    • http://sakipewo.22web.org/50479418536.pdfIn PDF document text
    • http://vugiris.22web.org/pediatric_papillary_thyroid_cancer_guidelines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_603ba57782b86.pdfIn PDF document text
    • http://e-devletodeme.net/bakekunovivazonujozs5fgr.pdfIn PDF document text
    • http://gugatem.22web.org/audacity_vocal_remover_plugin_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_602313951d96a.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/crjf7hd/kofafejujizo.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/jjgfrBk/assistive_touch_not_working_on_lock_screen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5ff78b426445e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407747/normal_60055576a15ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502464/normal_5fe0917691ff0.pdfIn PDF document text
    • http://muwabiva.iblogger.org/foxim.pdfIn PDF document text
    • http://robolab.one/turbosmart_eboost21rk7r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466386/normal_6028f2efecccc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://togetaru.epizy.com/95515486068.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/anti_plagiarism_software_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/adform_click_tracking.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/26521142173.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/gejebetuneladu.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_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 5260 bytes
SHA-256: a56611439fd70acab60721fb1302f8f5a4bc333a2cabcceec8769f600a671c9d
font_01_sfnt_off00013555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13555 10572 bytes
SHA-256: a638b16e8b336714af8a876caebf08bf2334bce4ebd0c27ff6d353d2d021a20b

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