Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe98059282d2b0e…

MALICIOUS

PDF

77.6 KB Created: 2021-08-08 00:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 08bed657d8699019b399bb7cbbf9f2da SHA-1: 7a28d254bc5ab2eedc8b0a54eea755c7a5170413 SHA-256: 7fe98059282d2b0e7819d8dc8689e6b9da962cb219ceb45e349eca9c5828cb20
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, characteristic of a link farm used to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7301

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 http://provia-events.de/pics/fotos/1/file/pafupaxetozub.pdf In PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/22305753565.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/bokujegekosorif.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/debujigelisivin.pdfIn PDF document text
    • http://hciclerp.com/asset/uploads/files/12535823987.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/8v6aprlvq0h6c8nmig315aihne/97487577024.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/k18ifu53ugs49nsvsmm8ctd5u8/56963679813.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/3067019278.pdfIn PDF document text
    • http://meta-min.com/files/medogesupawuxekelaxupij.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/sakexikugerajipapino.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/benitafaxoneketuro.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/26885303994.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/pakeroxusowag.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/65793408926.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607659a02a8f6---8720111118.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/bopixifo.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/mulodumog.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8264ccae3e---31723592879.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/pudiwoxapurerozajadem.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210705041359.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/f6k9sol9m39d0ijp318hrabcb1/saworinurujexobunajiwanad.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/83603228501.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/darc32puit5ecn70aud6km9cb1/77609763030.pdfIn PDF document text
    • https://werbemittelag.chupload/file/puwaxoweseje.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160838272e445f---bifubiroburevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=evaluation+droite+parallele+et+perpendiculaire+cm1PDF 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_off0000dd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1E 10708 bytes
SHA-256: 21843a20e92c757f010e69ad4a265f4fec997716433fcfc23184d113d31431c8
font_01_sfnt_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 18200 bytes
SHA-256: a9674c191fca37f1a9960a84d876e70573665edda279defcae047962a56fe015