Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e6e58ab87f36c2…

MALICIOUS

PDF

81.5 KB Created: 2021-10-08 18:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3da8f3aa4a8577fc576c4e6aecd879f6 SHA-1: 06778f12c8f98a007057c12c4f21e651be7b686c SHA-256: 05e6e58ab87f36c20967679f482299e1a87e0cbe68cf83daed74fb8d46bd24e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to potentially malicious PDF files hosted on various domains. The presence of a 'Callback phishing phone lure' heuristic suggests the document is designed to trick users into calling a number, likely as part of a scam. The 'Urgency / deadline lure' heuristic further supports this, indicating the document aims to create a false sense of urgency to prompt user action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://dayou.tw/uploadpic/files/202109161604437862.pdf In PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315680ddc9d---befevajodenenadogeluxazu.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/liwugebig.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/96672579579.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c73737ceb---44670058764.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/26295822065.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/3162220629.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/volewudurilavopanelewifi.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/67924084977.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/94460429648.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/43910047592.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/92966545612.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/24673948698.pdfIn PDF document text
    • https://ysh.my/userfiles/file/rakikebozamositufokometa.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/gobosot.pdfIn PDF document text
    • http://viettruss.com/upload/file/werotevadegelisadu.pdfIn PDF document text
    • http://salkim.com/userfiles/file/wobikadisevi.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/bigidavagogexolemowo.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/70111693123.pdfIn PDF document text
    • https://purmoradiatoriai.lt/images/files/93014564050.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/72461638255.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/94253676439.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/35781027848.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/zubebagajuzogadabupav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=just+riddles+questions+and+answersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 18884 bytes
SHA-256: a5bb4a21181e89c3b54fa4e15832031ab78e2096d26a6a7a91e1a2d68668bc60
font_01_sfnt_off0001079b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 10564 bytes
SHA-256: 4779ad496fb266fc6b20159131c324a5fca3da07d710469ea25cdcca828488f2
font_02_sfnt_off00011fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1