Malicious PDF — malware analysis report

Static analysis result for SHA-256 60631acc3c3464ff…

MALICIOUS

PDF

72.1 KB Created: 2021-08-15 13:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 501de7c2b934885cc55a322310ab1cd3 SHA-1: 3411ae12544d979cf5052c372ec686757eae2fdb SHA-256: 60631acc3c3464ff2c03a5096299ac2f9e34d3870f9a36146c509c7c9373f16c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. It also features a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute further payloads or conduct phishing. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=apostila+curso+auto+maquiagem+pdf PDF link annotation
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/4802dbcbfdeee69b8415efd8071e46fe/52572931030.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/0679b3b8dc09c4bd10c940c8615ba303/75856817470.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/vovupa.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/bb919e1cd0fa5e620a238fcf595542c6/mufefa.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/lv5gmkglfhj9292c88hik98957/73074769656.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/96b24d8987ad5eb7815f49cd8828754e/36222025937.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1dfb94fdf---jabaxapilemig.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/janimowakurevimepasejiseb.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ut4538jfaih5ca12t2a5be35hf/42401154825.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/dafejodanofodotaxisejolot.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c42b1c6d3---xuvube.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/30371776390.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e9f44d4b6---47915198573.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/wabunede.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/uo1svj611hrg83e38k0sje5bm7/92907566191.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/retatedag.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/welirudolobezamifiniro.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021080106054973499.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160940fba58b35---35496741352.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/jugagiregegowijijil.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/5e6248e4fe102e2927054ea142a6b18d/tedaxikeniwezexuwibi.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/l7nk8lc0rfq4ss2skkrrtuk50r/95217154276.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec99163c2e---11562214665.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CC 19504 bytes
SHA-256: d929813e8abb9c21e1d347a10d790e80bd71dcfcd096eaf519d60f461333e86b
font_01_sfnt_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 11084 bytes
SHA-256: 7c491401c09880e1e7a3515f2862e67170b6983b81e066d70681777d0a092e33