Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08301505cc6f9e0…

MALICIOUS

PDF

102.7 KB Created: 2021-07-22 21:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d32fd669cc41312450b05ca27feef80e SHA-1: c32748f093cfecc00865535f52527c314059a0fc SHA-256: d08301505cc6f9e0e5e83ef6d199826941da5a8df0ec3072c19f2bc2ca31358d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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.
  • 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 https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/97573bafe7d4425022a2d31414b11650/12752209782.pdf In PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/9f1d9a5af22b3907c14077f39096cfad/gowigubadukamewunoker.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/915ticsicj040l9ecm0g235jm8/96467541293.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/13629183684.pdfIn PDF document text
    • https://securityguardsupply.net/php/uploads/file/katov.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/62860621925.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuwixikax.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/c843dea8aae37ae5a49949f0115685d6/pibimagop.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f952ca2e1db22ca778ed55486fb24faf/teluzanoripusup.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/sezidexadenurol.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f60a5d5c3c8---pojobixixuluxoxax.pdfIn PDF document text
    • http://sun-tes.ru/files/file/nadonomitinuvupuxopafi.pdfIn PDF document text
    • https://melz-feu.ru/upload/67502388623.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/64650435537.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/me7odb88p9m4413m0jc4q500d3/xowudorewimuzomaxuve.pdfIn PDF document text
    • http://vitaminyplus.eu/files/file/savasubulowupipuwus.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/i9v8js4u7mpjd5kge3hn7aunug/77262366794.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/8novi08a73ej3ac6s16is8ifm0/xukebofumefirilotizak.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/rd6kkmti7aeaj7pr3bkgl9heep/14736449281.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/9b3a72103290036dce1b775e8b9de2df/sajomepejafudewonowob.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec5d69dfc---fupofijelif.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/21950767351.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/rubepowakob.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/vuvilavokafupimanexok.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3f6438a0---83758769917.pdfIn PDF document text
    • http://garderoba.sk/images/_file/85804798897.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sam+smith+only+onePDF 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_off0001297f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297F 20204 bytes
SHA-256: 33b88aac661ca2d4b185cf95f880c6426e17b4c9b1d0f8d06ab3757e13238626
font_01_sfnt_off00015c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C1F 10464 bytes
SHA-256: f82d1970abf8afea4460b3ca603d0af2aea40fef876b0396209f04d835718790
font_02_sfnt_off000173b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1