Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c174b41f85e30b6…

MALICIOUS

PDF

72.9 KB Created: 2021-09-15 12:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 379987668f36ede41871a46e6d15006b SHA-1: 63a09c9e5e405e21df418b26d2fe926264b6924b SHA-256: 2c174b41f85e30b63dcd3ed9fa5a47ca240ee0ee762e14244b9110651cf1a5d3
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one that impersonates the brand Netflix. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The embedded JavaScript likely facilitates the redirection to the malicious URL, which is designed to trick users into providing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://huntic.ru/uplcv?utm_term=street+racing+3d+mod+apk+unlimited+money+and+diamond+download.
  • 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
  • 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 https://huntic.ru/uplcv?utm_term=street+racing+3d+mod+apk+unlimited+money+and+diamond+download PDF link annotation
    • http://bdsps.org/slbdavbatala/userfiles/file/disoda.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/677f8a473ba4124e96292eed975a98c9/ladujaxuma.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/jitejepatibexul.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/66678669325.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/87298878382.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/4851726955.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/furojoturevikor.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5f8500d4e---11705411818.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/selofidosewuvunurev.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/39468497738.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/bojuvisepi.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/11631912581.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/8f49rsq2u0o1r8snlpj31qpp71/56494300878.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/tugadijutapozanegivupezek.pdfIn PDF document text
    • https://hgb.se/filer/file/40728277742.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/83430292209.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/dafofinupubikupat.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/saxexovosomivis.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/joluxeriputorenuzij.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/nqjh5nd11dtnfa9qaq1i3sjudn/15415218377.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/takifapotuzimusiwowapeva.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/famasususera.pdfIn PDF document text
    • 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_off0000b77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77B 16936 bytes
SHA-256: fd30e17d7695a9e64cd288f8aee4246d13379b93915c26ae9dc25e2fa580dcb4
font_01_sfnt_off0000e340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE340 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 11328 bytes
SHA-256: 10bf8f6a4b198d484d526319876c28595c8371cb4f594bbc4fc7b7f21c7197c3

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