Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a968a05c74f632…

MALICIOUS

PDF

89.3 KB Created: 2021-07-20 20:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c23382d63b0ae1d58876b069e8e020e3 SHA-1: 34a0d5848f27e610b8e8ba376f9f4f7299d89338 SHA-256: 74a968a05c74f6325a6f11efef6747f34cff108fc433de613bc523b5b753944c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution scheme. The presence of these links and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfa8bef082---dabanevimipufebijize.pdf In PDF document text
    • http://biaikatolikus.hu/files/file/90517466422.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afa702c6f6a---87248444762.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/21010246999.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607849bf56080---wenaked.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e6e71fdcf---vizugekid.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/290daf55e72ad9ab10ddf01177633927/rudajuwatamijimomawuvosum.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/22521732468.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/sasovojotavebex.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/67744acf5c19345f6eec9056013aabff/7396034766.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/wunosepimivuzimogipew.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608180c26363d---saronazazewipapotoja.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa981bbb0b---makowudil.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/pc623a5e72of5l6c9bck0n4rnq/10512980968.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084135368471---93642308549.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/2ho6plpkdgs8dvr3uijg7bipk5/dewaxunuvagevigixirad.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d541de4425---dotumodavogej.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/f39b96f0a4e6e49214d61fa744ecf2ee/viregi.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ca98d8137---47924425224.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f57bd12817---raduvegup.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/tagiremu.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/leledalukorobodizunulowi.pdfIn PDF document text
    • https://semangkabiji.com/contents//files/43425269374.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+start+a+formal+debatePDF 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_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 17528 bytes
SHA-256: 5962728548c706758fb117a3f2d70a7af6e0a221229d14c4a29366b45b607e22
font_01_sfnt_off000127f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14008 10536 bytes
SHA-256: 501d728e9c501a2b0532545c4e1b73a806c8f3e9fd2be3954faa534dcd4e3abd

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