Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebabf855ff6ba1f6…

MALICIOUS

PDF

95.7 KB Created: 2021-07-18 19:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 82261f651aa3adad67ce7683ed7545c2 SHA-1: 22b9e152b42f49d67a1ac15b527c42e7436dd4f9 SHA-256: ebabf855ff6ba1f6c1d02d3e9dd3b0a277f5699b4b6c4ed42e3fe53328e5e5e5
124 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as a lure to direct users to malicious content or further stages of an attack. The presence of multiple links on potentially compromised infrastructure indicates a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3228

Heuristics 5

  • 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
  • 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://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/074145de72177e06ad760f8a6c4cd2e6/mekuluzukewovuwo.pdf In PDF document text
    • https://daaeportrett.no/upload/file/43902243625.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/28044f560b2b5347e8ae5f1b64445f2f/pekuribiwusonotuk.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/rapujoxedula.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9601da8f3---sumopupufobuwuvasu.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/58191099808.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/xiduniseke.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078607351d4c---7351660781.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/9a653f3fc0793ac586e76979922c8d8f.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58875abf43---65178520767.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/11425322154.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/647830e98ab11725a1d621e80ac340f5/37558843156.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bf50b02d2f5592fc782658524ee3716/37864048172.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075b12dad94d---71721206845.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3c56118529c5ce58c048a3b8ecc23995/54248956529.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/segakafewiremigow.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608887ce10d51---47982137474.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/h893ouu71kvfnentonc992g26h/56275996632.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160d8dffc64438---82097022194.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/baliliwibufuv.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210714041401.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/77742920013.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1de9b2ef9---72218988790.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be2d5f19af8---69110869820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+binding+of+isaac+afterbirth+plus+debug+consolePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 11104 bytes
SHA-256: bc0e923ab68516585490ccbd09615eef8f1409023d2d7397dc163204073b30c5
font_01_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 20948 bytes
SHA-256: e4307db1ceb8004e28966c2249aa93af430aa8106ababc7845617386c34d79f7
font_02_sfnt_off0001524d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524D 3648 bytes
SHA-256: e6734875a8d634212878a5b4985468dab3a989d8e9fad1da13f242c89ecec686
font_03_sfnt_off0001607f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1607F 16960 bytes
SHA-256: 49252ab0abd14682b9d69a8a3f73726e4d1631035c40f77b1c8b33c2caedaf4a

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