Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c311004104c742…

MALICIOUS

PDF

74.9 KB Created: 2021-09-20 19:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf5296b60c7df96fe03454690e7ff06f SHA-1: 7caa6fa7f422ce5200a21069a13f27f4550577dc SHA-256: 58c311004104c742de1dafc45b9ef1a3f032f6f2d43758d8ba3f5d07c4b00eca
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5832

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://oniceh.ru/uplcv?utm_term=how+do+i+do+text+to+speech PDF link annotation
    • https://kirmatas.com/userfiles/file/15391115403.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/vukuzonamijazipezu.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/nogebazifolemikoruzutijin.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/9886213803.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/59744830839.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/64846240259.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/vejudewisosebigojukofomaz.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/014a822eb9a4166f86d810baf4ae2b65/kixofegemulodikeb.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f39a20cb4---kepinoloma.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109031948495145.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/xasuf.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/dopisake.pdfIn PDF document text
    • http://belniig.by/public/file/62607025768.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/41963689866.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/rlu41ptl1de96f2frcfc176k34/lotavuvajodida.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/jimagodijudubepewu.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6978ba09c---badulezomav.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/91895510497.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/25877382777.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/sefujuwixujijufetam.pdfIn PDF document text
    • http://school15-tyumen.ru/f/58724962484.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/98024399930.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/70340496803.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/637faac263d696172e2f25d6cce99979/48792197940.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 17580 bytes
SHA-256: 5bcfd8f49b11eeca20eea5f24362cf194bcfd19cb8af82b79bb139c9f2cf1374

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