Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7e70cb7a557b86…

MALICIOUS

PDF

107.4 KB Created: 2021-07-17 01:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5f1462e82f14dc062d421b60ffb57cdf SHA-1: 0c3a6b51e3af18d1081fadded765374b042ab394 SHA-256: ed7e70cb7a557b86c9ce71134e2d64e8b6b806f4e4defaf91cf85a54586a7b09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with attempts to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://ivaco.it/file/15907016726.pdf In PDF document text
    • http://jnnycc.org/userfiles/file/wafatazufonuzafenanev.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160856e8c7ca85---bewofobekerujis.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/68726228687.pdfIn PDF document text
    • https://blokhol.com/upload/files/vuxapo.pdfIn PDF document text
    • https://adikketiga.com/contents//files/wuzusugilujaku.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/jonup.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ffcaea60ff44f9ca5b4e90d30b261cf7/gitividonujilag.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/watewodepifunaj.pdfIn PDF document text
    • http://winso.tw/userfiles/file/vajigamuzirisuxamakife.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/fizasuwebomapem.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160add0b3d0b4d---vivozegezananofu.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a9bce7db---vazuvi.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/be68f8a0d87ea9b6e68d81ad5eff96fb/zoxoteduv.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab676605b93---sebepedakop.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/zajowitewudupesigaripam.pdfIn PDF document text
    • https://combrooncom.com/contents//files/zemedowur.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/73634815813.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/35646962186.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/572cd2fd1a7b245a8737c92ed0fe0be4/wusute.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/37502027684.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/83391120598.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607681276db66---68713612856.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/mutidusonijawidelutawe.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/6c1d2b9e2da1ced3ff8b458269c07d15/wezukuzopabukiropisetiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=connor+property+managementPDF 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_off0001432c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3E 17272 bytes
SHA-256: 9f2724b4ae49f0459024146aa972ca21bc6c627460170957b60ce31536ec08e5
font_02_sfnt_off00018886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18886 10432 bytes
SHA-256: 323ddc282d70d80d3eb2ac170381a712169aacca2d8c3346242c7d6d9cb2ca7f