Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e5dd15bfc43f60…

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 07:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 61ea651f13c4fb90274c450b81199c7f SHA-1: 6fbf49c76a86eae058c95c5399be2b354e3ad36d SHA-256: 69e5dd15bfc43f607e7a075b57300dc512987bb38a522ab7a15682ad1edec6d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6199

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://alquimia.in/admin/fckeditor/editorfile/12980132159.pdf In PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/tiloro.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371c0534cca---voxawuwiw.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/xopafibufifa.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/9377725f68bea321e33ab58e28df5b7f/tijatuvatudamanifewe.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/66671199712.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/08/file/18204678990.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/63845483171.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/fajijoboseburakajekigafu.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/fonilug.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/kebifokotolif.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/pevumusazomasejavigibomeg.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/remewivopokixumamo.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/52172602166.pdfIn PDF document text
    • http://rockbond-aac.com/id-admin/fckImages/file/zodevulakudizemarapexupu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141389650a02---bigajipevufefilizavemomos.pdfIn PDF document text
    • http://hodori247.com/uploads/files/wixidomiketizimubegira.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/46473362243.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/kitaperekizab.pdfIn PDF document text
    • https://matrixx.lu/images/tugorisaxed.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/febuwazave.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/63382768889.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/c9585bdc9f9ad2a6715fe35b578195e5/ribopugivilirodibugugifak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=after+movie+onlinePDF 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_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 10092 bytes
SHA-256: 2c873cd895e2d977062c77bf431ab3743062d5e3df8e29bd7e4f0137d8363940
font_01_sfnt_off00011a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A18 17288 bytes
SHA-256: 087ae3f662539de5a8bca040a67bfefcefeddcd1db2a10b8f8654fe33a33f482

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