Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6aa4974a1f4465…

MALICIOUS

PDF

62.5 KB Created: 2021-09-13 13:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a0f51f8818529743c37254d94fed92e0 SHA-1: d5beef9daa7411e6f6def74be7203cf8ec7762d5 SHA-256: 8f6aa4974a1f4465d864d024fde5a2fc6181adfe3162956477f2867bd4399bed
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains. This structure is characteristic of phishing or malware distribution campaigns, aiming to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7260

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://rentcar888.com/uploads/files/202109091815237561.pdf In PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0d9f394a3---zukadefivele.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16135eb6be618f---wugagoxodufapa.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/54830297138.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/34314412771.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/49848442478.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/6be06a264b64ed31704c8c3ad11ec641/lovuvet.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/5238179351.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/77726375733.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/91446585230.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/ruxazalubowo.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/27213073836.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/wamepefunuvegozamate.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/75997101345.pdfIn PDF document text
    • https://laser123.com/geektic/files/22906394161.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b50689c923---pibakebupubulusipawamifa.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/26841758682.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/2e84846dda3560a8e7a0453432cdba5b/95631542538.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/ribazubigenatawojilizufew.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/29420938980.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/2aqghoajqcujp7ge9cjf9ostq5/povarobapege.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce2bfa67b2---29893398875.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/jumobutamuzurufupuvarosis.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16134a61384916---81484654999.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210907_170006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+remove+android+system+notification+messengerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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