Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5ea6cf714d1c44…

MALICIOUS

PDF

76.5 KB Created: 2021-04-01 18:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e087d8120e0704c766aca5ad3af01043 SHA-1: f8d6104e53806cb7ecbeda6f2a49d212a4dc3b9e SHA-256: fa5ea6cf714d1c447ac9a9d90501e7237cecd5d3b056a253773c0965a4378950
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirect. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=complete+unearthed+arcana+pdf+5e PDF link annotation
    • http://vkysnaya-eda.site/ralinekilikazavoz8yey.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/statistics_machine_learning_python.pdfIn PDF document text
    • http://opensol.xyz/tixejanomolorevexofetow7vgab.pdfIn PDF document text
    • http://hookup753.fun/72096142090kwpts.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/how_much_is_apple_tv_3rd_generation_worth.pdfIn PDF document text
    • http://viwebadapo.iblogger.org/first_aid_merit_badge_book.pdfIn PDF document text
    • http://electorat.org/procedural_design_in_software_engineering8mjcf.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/beps_action_plan_13.pdfIn PDF document text
    • http://vovpomnim.ru/kufimovofobbgr7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kemetosope.epizy.com/kefapajawawamufigid.pdfIn PDF document text
    • http://zetowimular.rf.gd/pelitenituwudogi.pdfIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_7b2c924ce44f41e1b4d5929643d27dc6.pdf?index=trueIn PDF document text
    • http://zepuwiz.atwebpages.com/pumizewi.pdfIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_f0b75f670d7a43be93fa169f8286308d.pdf?index=trueIn PDF document text
    • http://laletanegimiw.epizy.com/malayala_manorama_weekly_download.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/bonitasoft_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/lanepebidife.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/41424509105.pdfIn PDF document text
    • http://pepebejawu.epizy.com/98763582835.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_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 5244 bytes
SHA-256: 59581f63d60b7c0892fd4e8f1d500101c81923794a6b54c6ec635615729e3210
font_01_sfnt_off0000fda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA4 11032 bytes
SHA-256: b545a38723e4c641e80a61549beba4a2478fa902b8a742b8d43158e61e0ad24a

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