Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2ba98a4714d7a0…

MALICIOUS

PDF

76.2 KB Created: 2021-07-26 07:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e97fbe741d8263a16cc5ee68314fae35 SHA-1: 1a0e96042543af7db8e344f2d7569441032a27f0 SHA-256: 5d2ba98a4714d7a083fddf385c1ff24b75097a64bd298cb3ec0e2d598a82d5e1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document provides instructions for accessing an archive, a common tactic to bypass gateway security. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5fe34b8e9---44276927398.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d8aad195fe0---75813794803.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a850e8b9bbb---61315912229.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/773a78e1538d24476929e80366926cbe/meroxafuzapikufijo.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/49864603508.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/sabat.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0671c545a---51113605181.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a446e671023---10270972644.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210717230103.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/3l37g612dgtq7ev8k8ecqgs9uv/gepanapigujo.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/5288e47697cd78f9796a05311c074275/wujuzaluvavozukux.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/sojegigebawoxalusi.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/dobepisovijexavepixolot.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/70742825806.pdfIn PDF document text
    • http://tomlitkom.ru/ckfinder/userfiles/files/riloboxapopim.pdfIn PDF document text
    • https://activepymes.com/pub/file/gamedefodevidow.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/vixozajajaw.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/9792483455.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/91ec470aac811002e1901ba35994e5a7/53946008814.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a754b1b4449---31824606668.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/77463797132.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/35326545264.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/sowim.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/82044902524.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=pcos+diet+plan+menu+indian+vegetarianPDF 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_off0000c86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86D 15700 bytes
SHA-256: ca9987ffb1ec1850db808f4d0b87fc96f8d7548a7edce46222d9b80537053bb9
font_01_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 11024 bytes
SHA-256: fa9ab1e12268dd9b6b8c414e7aea3a73c3da7a36491c506d14bf2e714b717682
font_02_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1