Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b6f4ebc888ebda…

MALICIOUS

PDF

67.8 KB Created: 2021-08-15 19:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 278632f13141de51ff3c0c3eab79fe17 SHA-1: a201f7d1b439aa37ac125aa52e183c1304b6134c SHA-256: d9b6f4ebc888ebdaf4961540c36b93e287f2339130e722f017df5f090e928b5b
220 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous invisible links designed to trick the user into downloading a payload. The heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' indicates that these links are intended to deliver a malicious file. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16072d3df64f6a---99632402966.pdf In PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796b6259df3---lorojejajesutozokemujuf.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e4f31c7c5---mopex.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/somunojekexogi.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/suvowewas.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/43601506131.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/xuxeludebolodu.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/d4a1b7c348819bec8b2cd9847e6a3fbf/63339424838.pdfIn PDF document text
    • http://poiskvod.ru/images/file/ruludafipuwuvomega.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608554ccbd91e---gimelaxe.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/62478639870.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/21168836129.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/8qjtu7rne71bd3edktllunrb04/duzomokuvivaz.pdfIn PDF document text
    • https://bangkoksolarpower.com/syner_upload/images/files/31444158873.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/24292929312.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/fekitaramobezog.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d50285ba5---lenexoj.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2dfb779b67231eaf8724adbc6f7dbd81/71869002095.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d935473dd8---vekutefiwefixa.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160863fe082952---34206006340.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210730013250232.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/weloruzugeniwo.pdfIn PDF document text
    • http://wdnederland.nl/file/84041497070.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=tamil+new+movies+download+madras+rockers.comIn PDF document text
    • 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_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1