Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bd3ada7a451886…

MALICIOUS

PDF

90.6 KB Created: 2021-06-28 15:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad4b86233dcfefbbbc1b0126526bcfb2 SHA-1: 07f3c61fb0d6c26619a4cee33d3afe772b10612b SHA-256: 46bd3ada7a451886c151be968dab6a3321a45c3c9b5323fb9aa3e6c3301318ba
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to external resources, with several hosted on compromised WordPress upload directories. The primary purpose appears to be directing users to potentially malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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://a-swiss.com/upload/userfiles/file/jojixikonanulokinin.pdf
    • https://egca.fr/userfiles/file/14028724394.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/69832d5033786fff49c2891a2be24db0/mekubepabaridip.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9ca6afc7c7e431f6fef4c7caafc4a31a/xinixokisexopijonazibe.pdf
    • http://texmet.pl/userimages/file/79752967723.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55ed07d475---28922075570.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/4f74dnl8gd2i5ev3en3g5hl3f0/berupesipifimopa.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00482b2fbf---vezowizitofak.pdf
    • http://riskhedgetech.com/uploaded/file/87602171060c29942cd806.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/fqeeskcuceto2l1q27lrtmv04g/davubur.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907a9ecc433---xelepis.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc0716aa07---27553193330.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/c8j3n4bnjvi02m3u751aj2rah4/wekesepoli.pdf
    • http://anbao.vn/uploads/userfiles/file/gekadusogekepev.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/3cvsa4uji3f6fo9lnh3ienpps5/69155601728.pdf
    • https://yuss.it/file/30128823411.pdf
    • http://robalton.es/Albums/images/file///bexixore.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/tvp0smfvriq603nlob3os5shpm/60358182210.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8d11b50b3---japimitepe.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b1ac0ec8f54fc6e4045773f820ce2476/jirelafupijezirewasoso.pdf
    • http://e-skala.pl/userfiles/file/bokefele.pdf
    • http://shinies.ru/img/lib/file/61514827464.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886a300c79b---zugavijos.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=emmylou+harris+here+there+and+everywhere
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE03 16792 bytes
font_01_sfnt_off0001161a.bin
47474898a08301dece1fab314b4dda5f46b54158d9f73f7ec1b6f7e7d3e72259
pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 10860 bytes
font_02_sfnt_off00012f08.bin
cb6cc1afc0dcebeec4b8a8455692121f7a150d6d9e61a82bb69e13a92ff99c24
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F08 18304 bytes