Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98ea94512d8994f…

MALICIOUS

PDF

69.3 KB Created: 2021-09-03 07:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 40b84fc8c9af3a7f9ff8fe566fcc3486 SHA-1: 481d3c99788a35d6f01fc10e51ecf3d94f55573c SHA-256: b98ea94512d8994f2de73f963646dfe7b87da025fc3d5695235fd8f61e6f45e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or domains commonly used for malicious hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

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://gediklimakinahidrolik.com/resimler/files/navoduxolasobimarenil.pdf In PDF document text
    • http://inphuduong.vn/upload/files/zizikejagib.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/xutopuxotijukegizorevomun.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2478750230f29b12c9ebd92cc113d4c5/23967853425.pdfIn PDF document text
    • https://ratosatu.com/contents/files/lurazox.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/58580834794.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/wuletewibulolozexe.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/16670d4eafdcb0d9ca9dd77cf6840d68/xufobomozojogesaxiva.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/bubfta4f88inv3sd7dvosumvg0/vaxebotuwubamumelupatilul.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/75d90b5ff3a463923e123e025ea6d418/63946053389.pdfIn PDF document text
    • http://hanauhrova.cz/files/rowusove.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da598494f04---kagisezagexegun.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/92177204499.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/2cc7hjne0s7vnia7dadiho3nqs/19457153086.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/50523322166.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f2194ccc6---20053624487.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b4f7005d0---nupif.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/bimigonoduwavewada.pdfIn PDF document text
    • https://senhewood.com/d/files/zejoduxinusisogavuwinewiw.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b28193d10a4---33134340063.pdfIn PDF document text
    • https://argumentua.com/i/file/devedazexenujanula.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160caf498abfa7---fenusutakejezobumifale.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ccfe4cd00b83ec62c6c6f8bc27025ec0/87855875337.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096cf09bd150---pewetovarutofodabon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=heather+morris+the+tattooist+of+auschwitz+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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