Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb12560213e1633…

MALICIOUS

PDF

88.3 KB Created: 2021-09-06 10:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c90235a646b421739bf11f8633d9c9a9 SHA-1: b4d009656d07b1724305e5264b4f8df1c8ce25cc SHA-256: bbb12560213e16337aac452c4db49bea64ee9fda55dae34d5d7c9d56fda75b39
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites. Some of these URLs are hosted on compromised WordPress upload directories, suggesting a tactic to disguise malicious content. The primary purpose appears to be directing users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gimokitofoponezezev.pdf In PDF document text
    • http://kibbkw.com/uploads/files/jutukudozo.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/silexademodekix.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6189dd939---wuliluzod.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609efc9dcfea0---11844326801.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/94092271965.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/encpkdtobim2a2sab5u3dqbf5r/99155542310.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2101e2501---tenuzazusejoda.pdfIn PDF document text
    • http://exima.kr/userData/board/file/68017647275.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/katebopazulelumagowul.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/68f08e9a4267edcd448c5a8c198e4af6/mewuvirex.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tobanugilavigobisekarut.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/2997e6973dda7a102f69f43d6d0b201f/85245452982.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ef8a55d65cecf8bda3d77520efca7547/91400317703.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0b7036ada---vusifume.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/70085641651.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc1b80c9c3---wuzuvup.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/jowokavogigibozapa.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/nipugepozumarabakimuvudi.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/153321ba56b628f5af416b5094b519aa/39751977472.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/39276632120.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/legagagivafevimofivi.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/55275450162.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/zikupiped.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=britax+romer+evolva+123+manualPDF 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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001002a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002A 10768 bytes
SHA-256: 76b92e137d10cff2be2af94899a441b6754024bac81501a9eca18e217db21f29
font_02_sfnt_off00011914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11914 22896 bytes
SHA-256: 195cb817c09bf99d0013a5d1dce5be404ef83f3aaed284d07a6d829660393832