Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f37ead036f2ba8…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 11:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: df5c5adaee7be7b4dc71f6bf02e47f3e SHA-1: 620ada91eb6fb7ef481fe59801281696089eeb57 SHA-256: 24f37ead036f2ba882686d520383affadd8e2d2ea3225d79b0d08c5d0d8204da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, directing users to various compromised WordPress sites and disposable domains, disguised as a Netgear router manual. The presence of multiple external URIs and a link farm structure suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://ketchas.ru/uplcv?utm_term=netgear+rax120+user+manual PDF link annotation
    • https://almuhja.ps/ckfinder/userfiles/files/dekejugezumigubogemeb.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adb029ed603---27095935122.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/kowasoxonunelokigewelivis.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/79625531100.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610788a7bffa9---39979391589.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/91372634376.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/6794825222.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/batimejalafuzurom.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac64c432afb---lotav.pdfIn PDF document text
    • https://wittnebel.dk/file/sozig.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/41368369529.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/mamexa.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/52326234241.pdfIn PDF document text
    • http://teresachild.com/upload/files/30591852427.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da4a6127047---fegopopobagudapejuxisuta.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/dvkrin3vm98v4cv0ae8317hlmt/96991694856.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/86277246145.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/62318743449.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/79036313369.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/23775155601.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609655de8ac36---12738884566.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/kosisusij.pdfIn PDF document text
    • https://wecareprogram.org/images/file/bonezuriruzovife.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/52a8a4b63bfd63171f4d78d164440175/48970090363.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d2717fe2b614a0f6eaa25157959b006/95843912425.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ccb25c3398---ziboneruduloxuwo.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/36250511641.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_off0000d713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD713 10712 bytes
SHA-256: 36f76bd3c84e3c3b368d83383630c8537612cc97ae359e54d1a0716f6ab3f238
font_01_sfnt_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 16888 bytes
SHA-256: 0af5c15dcbb07778e5f5c2455f832b95fe507447595af1fcb268b088dbe2e976

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