Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa901b8a7ae75244…

MALICIOUS

PDF

69.3 KB Created: 2021-07-24 11:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: deb2a0023bd1b127ffb9836713787553 SHA-1: 7ac65fe0eb3b8390551e31210fe540420f1edaca SHA-256: aa901b8a7ae7524445c62a61ebd6f81d87e8371ca8db72b65856cde1b057c12d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites and disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the structure and URL patterns are strongly indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/158de7cd8ce2f37f61cd6418ac5e40f6/pazasusadememejabikukusu.pdf In PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/budobep.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/eeb71653b43e2b00e820436a3a872317/83161103460.pdfIn PDF document text
    • https://termofriz.rs//files/jasavomibititenafosobe.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/38016293691.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/66c40b9b73e34884adfc6a17f896a8cd/fozomaxodijolugegibo.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160956033ce360---mexame.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7hvdu6kc6j8n8sj9kqo09rk03u/xukamovawitowusejego.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/2f3stsl60k26t66ffch57r3gr6/63694453804.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bce1b28cc4e---22860712859.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/hnii04fit1jd9upbbr75ract8l/xamepijedazosu.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/76581211290.pdfIn PDF document text
    • http://amouage-salon.ru/admin/ckfinder/userfiles/files/xupozulabajoraxawireme.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aec0c40e885---lazenofe.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fqv3tvit5cjs3t7akr289su54m/32277096251.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/vavumegafebozizu.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3e15d3410---soduvazun.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/fosinifavazugu.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/kuwolo.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/65854447839.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/cdd39a9bd27b73250339282cab6b36eb/zapuvijikimufisinafodosej.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/24837795268.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/makuroketuwoxuzulajiwibux.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/aef106ddaf159944a5b9c7b7463a3d39/38466172325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=okyanus+yay%C4%B1nlar%C4%B1+pdf+indir+lgsPDF link annotation
    • 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_off0000ca6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6F 10700 bytes
SHA-256: 75da7ccaad85fc0dc8986e8f43beaea0c960bc51207739df6215c6895d7409cd
font_01_sfnt_off0000e2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D6 18628 bytes
SHA-256: 5713947b866579821a0b8a346ebe3ab3fa813572f2345efd3995817907da820e

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