Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77e61bdc47998a5…

MALICIOUS

PDF

205.3 KB Created: 2021-09-07 23:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1e396c741c7ee9388e5d50d17ce267e7 SHA-1: 8d4c22b9b58eeb4f76bfcd63924764de1a96d007 SHA-256: d77e61bdc47998a5d115ecc97ca4ae64de0b29a4ff3e1104c22119b519cfc62f
126 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the presence of link farms and the overall detection points to a lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/294rj8l8oq8ik0td2ei8c82si4/58113253120.pdf In PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/watinefobutodarixudogixon.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6c5a164260b7d6a062734ca66df5dbeb/90466545479.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/350212f3ff7fe4089d55e685cc82f1b1/xanezewewo.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/zugenunawolopitobat.pdfIn PDF document text
    • https://telenovella-bg.com/files/33011926009.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/votemuvadufuboruxizol.pdfIn PDF document text
    • http://recviem.ru/img/upload/bulojuxevaribajifavekujo.pdfIn PDF document text
    • http://allasclub.com/campannas/file/nuwitusizuxilodagaximeve.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/18532517666.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/4306734156.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/843342caaa8475a597872167a7129831/luwoxopagolaku.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/xudewulevovavugagulus.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/a59bd64db314a3faa82c50d664f477f4/ragozeresazutovezubef.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e09a363a40d---63845530996.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/50122609501.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ip6v00pdck4s677tq6cavdrgi0/biviruluzigafejulobiv.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072da54e7892---66321783790.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/51735546517.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/latitifupupesuxiwe.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dc09b05cf61---zezinugazamigazotu.pdfIn PDF document text
    • https://synersys.fr/contenu/file/28666071257.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/ced9a6f7beaabe925316c59b02181301/50960311310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=codigo+penal+militar+atualizado+em+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002bbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBD8 10864 bytes
SHA-256: c72cd35dca73d4eb792803697847ba73c87e876ac7ac93ae269c433ec7aa28ca
font_01_sfnt_off0002d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECD2 21480 bytes
SHA-256: 59bbda8d378e4f2dfc2e3796c5f5160d50e908352b126ce5ea2c2c0e87c5d2ca