Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0017f1fd6cb83f8…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 04:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7e62ca334683cedd6e6c9b2b5dfc69cf SHA-1: de0086e56cd2c55b402380643572256af2da2655 SHA-256: a0017f1fd6cb83f8b1df423d0c67fdb9d215ecec3ac583f09d137b3eb54e4e3a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', further supporting its malicious nature. The presence of external URI links and link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0181

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://huntic.ru/uplcv?utm_term=adding+and+subtracting+monomials+worksheet+kuta PDF link annotation
    • http://onlineexpert.in/userfiles/file/60482780625.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ssra49ihmq0mgc5smvmhoks9m2/24720148846.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/kavofevekaferirozomexojeb.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612cabb4bb093---50213537473.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7a1201942---gikelafilabesi.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/wisuvupos.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/16227835874.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/jedokazivu.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/92750740283.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/jafabebugebug.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/vagobibojevozo.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/lutewe.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/ladowepejepagabite.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/98645620055.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/ribegudomokiw.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/6796787785.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/gujonibunu.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703bf268f54---84223119699.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/betanuru.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcdcd5768e---towexidomemuvidexud.pdfIn PDF document text
    • http://actinq.nl/upload/file/30657761700.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/36330494485.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/27046873927.pdfIn 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_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 17868 bytes
SHA-256: 535dadd6942c36db391083a391aa18a128ed144e5d789ee97070aceaaf24c57b
font_01_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 11216 bytes
SHA-256: 0771f11eb0688a02542097cc41511732e27dd6227b84be6d8c93ef11ead9d3c2
font_02_sfnt_off00012c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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