Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d22966289db89a…

MALICIOUS

PDF

73.3 KB Created: 2021-06-02 18:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: db5f795022658d86eeff490b727d130d SHA-1: 3cb611b820097058870a67de0c57c0bdd3e7dd4d SHA-256: c0d22966289db89a2f2c50f175daaf5674d4649241538b3398523b9757424a0d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_CLICKFIX' heuristic indicates a social engineering attack where the document likely prompts the user to execute a command, potentially to download and run a second-stage payload. The presence of external URIs, including one on 'dugedepap.ru', suggests a command and control or download infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=flush+dns+android+terminal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367281/normal_6052be2f7ae6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_5fdc526e266b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465264/normal_603fe37b86eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_6058e330401f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vogituvu.pbworks.com/w/file/fetch/144495876/how_to_use_candle_wick.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/f/17009095397.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144419568/how_to_connect_veryfitpro_to_watch.pdfIn PDF document text
    • http://wurutaw.pbworks.com/f/dadebovuxejosilatugurif.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/lgn_dersane_mzik_indir.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/little_johnny_what_does_a_pig_say.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144450957/bts_bon_voyage_s2_ep_2_eng_sub_full.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/w/file/fetch/144506838/kijaseweputozimagabi.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/w/file/fetch/144508647/morilota.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/flutterbye_fairy_instructions.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144427026/kibilexotavenugel.pdfIn PDF document text
    • http://vogituvu.pbworks.com/w/file/fetch/144507621/18251140815.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/differentiate_electrolytic_cell_and_galvanic_cell.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/differentiate_between_qualitative_and_quantitative_research_methods.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/nuzopalokubetoli.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_off0000e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 5020 bytes
SHA-256: aa42f052bfa3da197d09af3c116ce18739ce23e28fce25d5e472c53357081535
font_01_sfnt_off0000f240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF240 11272 bytes
SHA-256: d98568cea0f516e95ddabe42c2cd61f3af3637c947a278e83154afbc762ebaa4

Open this report in the interactive analyzer, or submit your own file for analysis.