Malicious PDF — malware analysis report

Static analysis result for SHA-256 214ba92943cf0af5…

MALICIOUS

PDF

86.1 KB Created: 2021-09-06 15:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 55bcb5ade477a2cbe9a3e672b37b1dd2 SHA-1: af4e56c3417caf66b4b078684520c269e34a0de4 SHA-256: 214ba92943cf0af560b2f84f8772fb94f9806ddf03bf2094bca4e0f5ec4c83b0
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS uploads or disposable domains. This structure is characteristic of a link farm used to distribute phishing content or malware. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://nordicaluminium.ru/userfiles/file/88815235882.pdf In PDF document text
    • https://asiajitu.com/contents//files/31453512429.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/bgua52pqte0kebcqrjvkctovu2/10150260355.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/33284403434.pdfIn PDF document text
    • https://andana.us/files/files/30216709623.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/dc4bb9106bae29e09a13731a756f0a70/zasalufapofo.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/paveraxopowopikabi.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///livopofow.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a47fd09e527---36803571359.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086917261ca5---2942308652.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe0951c2d7---gupexesibagowukutarupowot.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/73414095244.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aaa1afe28---2693088929.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/xupofazakuvaro.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/2ce0a9de03899fa67a9773b6e1c0a7e2/moselodabiwel.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/28901087122.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/6584f80e1cecfbaa764821f99d3f6b53/90973284576.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/51440478688.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/gamc7la9qam4oknjpnipoqeng2/sugezesezovuxofuj.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/kaxelaforinonebipaxi.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161273ab803de8---62630008689.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/50e23bc1735d0576eb1af90b23a9f4de/8040794698.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/k7rsb7k3mtpauf46h4ftk84106/fifapofovofidi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=stories+for+reading+comprehension+3+l+a+hill+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_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 11316 bytes
SHA-256: 4d32e3c68ba28c9acbd4c665e07d3ddfd87e5631e755c5963de1d51381e38614
font_02_sfnt_off0001188c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 18968 bytes
SHA-256: 7759fa4a63f08e7400c25a4a1a12c83a5b0d9cf93763700bb955d6f48eac3ee6

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