Malicious PDF — malware analysis report

Static analysis result for SHA-256 8036cea58b31bed7…

MALICIOUS

PDF

81.8 KB Created: 2021-08-03 20:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a43f76686b99560d3365e9da47cd85ac SHA-1: 0206de0209939817c8da2a176fe0f519ea06aacb SHA-256: 8036cea58b31bed7e52b56597eaf018d4654f5d16a3b1be3f963fa4a3e8eb61b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing or to distribute further malware. The PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4890

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 https://drafthe.ru/uplcv?utm_term=quantum+jump+meaning+in+marathi PDF link annotation
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbd18c808c---fomilozev.pdfIn PDF document text
    • http://hondaotohaiphong.vn/upload/files/turekutu.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/b0cdcbbd7228415220cb2b7f6a96082a/28511018164.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/584b6c85d1e7465b2127e61a6440b14b/43867830672.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/01031f9071d3b34b4a5b69e87c417fdc/jusab.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160da5af1424ed---41426025688.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/xaboruvewibaz.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/3831382301.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/hgujuuvjqlatjuf39pu2rmk1s0/66180524727.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/23654020458.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/57921807523.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/lizelaped.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/nenow.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/5410689864.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/d4gngu6efui2fne3alssv62qd5/11337426205.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/69519274026.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/75357822447.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/h7p2hn3o8aesf9osl0b7ianl23/97134320150.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/warepuliseluxe.pdfIn PDF document text
    • https://actorconseil.com/files/file/jubofazidulizululof.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d73ae73c8d6---66205951534.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607951d2b4179---viwuwozesovo.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/65960724421.pdfIn 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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 10652 bytes
SHA-256: a1accd469e007c7b77a7071329359084c5e03a89282ecb0706de697741276d6d
font_02_sfnt_off0001148c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148C 21012 bytes
SHA-256: 21f6b388b6d28205593b8361aecaa833ab85f0308df9b6e06d5aaadb2aa1a693