Malicious PDF — malware analysis report

Static analysis result for SHA-256 82aa2191f9fd231f…

MALICIOUS

PDF

82.4 KB Created: 2021-09-16 01:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7d312455742af9a7d066224546a3f7de SHA-1: 976ba91dcb7b21fa28668502d7a5e265215d64d7 SHA-256: 82aa2191f9fd231f06c35f3ac05cb5326ac3756e14c4a5768988cbec93d0d74e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest a potential for JavaScript execution to facilitate the download of second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614048fa22724---vekopinaje.pdf In PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/19d4696167a80bddb124fec23d50fcd4/31233924980.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210913002437.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/3888920234.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/78095829783.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c9860ec2a.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/33291651352.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/dfc28222cb3e1b8f820c967b942593d3/todofawumuxosexeziw.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/pafudur.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/kerot.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/57548813784.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365f2070791---xavulatuzavapixut.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/tewawilatunu.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/bejesakejopa.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/manizanomedufafufuxutim.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/tuponatakebaxukigofitake.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/77916958632.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/niroginalilotuvivaxuxivel.pdfIn PDF document text
    • https://geniodelweb.com/file/vorerik.pdfIn PDF document text
    • https://j26clean.com/upload/files/52978026783.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/wosetir.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/25999600410.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392f009523d---12693666548.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/99217025903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=love+punjab+full+movie+download+720pPDF 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_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 11064 bytes
SHA-256: 7475a7d382a55f4d458693be6f899e4e3379053de21c8eb78bdae596df155930
font_01_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 17380 bytes
SHA-256: f5250c2b253de4b5b94446319fd8b11cdcdad87550f450705c44c72e8193d39d

Open this report in the interactive analyzer, or submit your own file for analysis.