Malicious PDF — malware analysis report

Static analysis result for SHA-256 df04dc5309780b84…

MALICIOUS

PDF

71.6 KB Created: 2021-02-18 11:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d97fbdcc8b2e521f203630bd4a2b6a2e SHA-1: 54ec7a501358fe50e105d3c2d0c78cdb2b01dc37 SHA-256: df04dc5309780b84ec871e412d50e73849dca000f8641c250916bec6338b7f6f
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=spay+neuter+clinic+mesa In PDF document text
    • http://wejnpowk.space/54788157049blqf5.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/segf0jb/word_crush_level_560.pdfIn PDF document text
    • http://yblda.fun/motorola_surfboard_sb6141_indicator_lightszb50e.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/tOghuij/rocketbook_wave_standard_smart_notebook_with_pen_station.pdfIn PDF document text
    • http://gejobukopap.iblogger.org/pupatitumepujonodipavax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvovidesom.epizy.com/w_4_form_maximum_withholding.pdfIn PDF document text
    • http://jujeludapivibiw.rf.gd/60075154861.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/58849165193.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/pipuguvavinekaja.pdfIn PDF document text
    • http://dimebuturerab.epizy.com/aida64_free_windows_7_64_bit.pdfIn PDF document text
    • http://runapapaxezupow.rf.gd/55525113856.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/love_island_t_shirts_missguided.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/guider_pens_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/8130806387.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/solelakemizulunolosoze.pdfIn PDF document text
    • http://kukuvil.epizy.com/catalog_design_template_free.pdfIn PDF document text
    • http://voxotili.epizy.com/iq_test_papers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/los_adjetivos_demostrativos_worksheet.pdfIn PDF document text
    • http://xodenumaverap.epizy.com/gatovekabudiwagekag.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEA 5284 bytes
SHA-256: 3200da053695ebd4f8d89e6c3cce2f0647ab0a5fcd9b8d0ba285c706acf89633
font_01_sfnt_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 10572 bytes
SHA-256: f04249cd985753bb8ad706bef337dae0cf27b90dd1d5a49dc69ab463f5f69027

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