Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3e09995d8c68d3…

MALICIOUS

PDF

75.2 KB Created: 2021-09-07 02:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b767ca66ae1aac4c110f25cee8b5e5eb SHA-1: da6e71948745d430a64d3947ab12c649646e5268 SHA-256: bb3e09995d8c68d370b20c1aa95d22cf73985e055153cd00aeabb74ee1b5c498
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified the PDF as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The embedded URLs suggest an attempt to redirect users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/15952474301.pdf In PDF document text
    • http://sacoorhealth.pt/site/upload/file/zoletewop.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607169b1101a0---salulamigamelatuzafid.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/gopodow.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcba1917716---lukogepasamazagirupira.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160932d4f1a1bc---fulufowojozolenixijos.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/matufatifasixoloxig.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/fafopawe.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/6a04285ef1efb9ef6ffdfb0930b874e9/gamirijukufajipemofi.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e578228d---monuduxagageloni.pdfIn PDF document text
    • http://cartopack.com/Images/file/40377568572.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/lulodugunofoxanevurowaniz.pdfIn PDF document text
    • https://nexusmediation.nl/files/jikupeziwufi.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136825127e68---16734505455.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/71926450930.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160892e0630f0d---17097433179.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160effb3ac3f76---bewedux.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/64862773930.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/35750326584.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/34840548092.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/78723686398.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/19762516381.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/12043422577.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/8b2e37e7ebc37d07d0072b260e5b4561/lagitez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=poverty+and+income+distribution+wolff+pdfPDF 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_off0000bed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED5 17444 bytes
SHA-256: e0f838ce5312651db26f27bbc8dceb8bd08ff3d08f3820a5aaa55ee26c7636cc
font_01_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001042c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042C 11288 bytes
SHA-256: 1cb5c95f27e83c129591bea1db88f99c561e1954a2606ccfd20e763696a35e80