Malicious PDF — malware analysis report

Static analysis result for SHA-256 a732d16582bb4bc9…

MALICIOUS

PDF

87.7 KB Created: 2021-03-06 05:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bacf2acbb3964e309277bca03a0c69cd SHA-1: d6d433901e34c5a13fbb347e61393e12fab6e7f3 SHA-256: a732d16582bb4bc90e1642db960ff7bf9d1b86e2af2d8840aca25a25c69c9ada
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=excel+formulas+list+with+examples
    • http://gesoxusem.iblogger.org/99650498914.pdf
    • http://datujizid.iblogger.org/wulekonadugadenafetox.pdf
    • https://fawukudaboguris.weebly.com/uploads/1/3/4/3/134353338/8346040.pdf
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/lisazusur-vixexuf.pdf
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/kadomam.pdf
    • https://cdn.sqhk.co/zinazejoras/wG2gjib/audio_tool_app_free.pdf
    • https://cdn.sqhk.co/zefafulolit/hbgiidW/dompet_ethereum_indonesia.pdf
    • https://cdn.sqhk.co/jenireni/chdt30L/basketball_club_story_tips.pdf
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/zuberi.pdf
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/dotar_jered_motero_nobam.pdf
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/7162964.pdf
    • https://tevifetaz.weebly.com/uploads/1/3/4/7/134746506/2684194.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pafexegud/21893982421.pdf
    • http://vukigopi.rf.gd/adjournment_letter_format_for_sales_tax_officer.pdf
    • http://nefaped.epizy.com/2017_chevrolet_equinox_lt_awd_manual.pdf
    • https://s3.amazonaws.com/rodakarugupoko/bittorrent_bollywood_movies_free.pdf
    • https://s3.amazonaws.com/mexijegedakol/cdda_starting_guide.pdf
    • https://s3.amazonaws.com/vexeliku/ms_sql_server_2017.pdf
    • https://s3.amazonaws.com/jirebonudur/nsw_apprenticeship_training_plan_template.pdf
    • https://s3.amazonaws.com/sesijesule/basdai_score_form.pdf
    • http://nasewuji.epizy.com/tezisuporubikapaxibe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117f7.bin
ce284e7c60bf95d820294a264ed9fd3bc8e73e6b96a574a9fef948de1eb7a6f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 5372 bytes
font_01_sfnt_off00012a2a.bin
a269ae07314aaed4fc2f98f2c79d1146e62f902cb44028127e80aea0ce7b906f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2A 11632 bytes

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