Malicious PDF — malware analysis report

Static analysis result for SHA-256 5061701de1906976…

MALICIOUS

PDF

77.6 KB Created: 2021-07-07 14:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e75b9b53c33a81c164234adc083d5bc8 SHA-1: 8b6b6df9983b5a455f50192c7d5e720bc30df69f SHA-256: 5061701de1906976bd16767d4d59b034789c573a5a0089ded8e4544a71489f29
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including links to compromised WordPress upload storage and disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The embedded JavaScript likely facilitates the redirection to malicious sites, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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
  • 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.
  • 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://namthangbasaltstone.com/uploads/image/files/jodetuneba.pdf In PDF document text
    • http://chandigarhdatarecovery.com/files/file/palubikaxevemezilazuga.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60D0485FB9F31.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a29d580a234---22577235724.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/famodelepinarafaniririp.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608611fa10a61---15386223625.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/rakum.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/toreribulakabo.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/91732575752.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/at8mbdg8rdmfsb15m50qd2rkqf/bufobovimu.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec3484749b---luzifegitimufir.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/v8attjsih1vd45njofv3hnplh5/74100041305.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608768c87e8aa---44274898959.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62112f44a952ae0c70b87b624858e48f/zokojitonukebofuwinov.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/7b7705109bdc980825a80e95554f21ff/sopotiparimafizawinajumet.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/35348305534.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/80971434161.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/39178353998.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2a4dedc2aec601ee7d3682606069ace1/wisofixoru.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078a8cde9a9b---31993938724.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a37e59b09ac---madegiseluzekakivozonij.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/766ad4d973351b4b2e5c3505a826a3dd/41799946751.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/91907780087.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=jumble+solver+2+wordsPDF 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_off0000e30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30F 17172 bytes
SHA-256: f131192bb1b849c34b033e25f479b24353f83cc252b6fda0dcd6dc16919565d6
font_01_sfnt_off00010fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1