Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f75a273a9cd731…

MALICIOUS

PDF

73.0 KB Created: 2021-09-04 15:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4b3aab7b87c9f30f0923557f98a19085 SHA-1: 0d8f700161a6a9486a18507d1528a798a0acc14b SHA-256: e1f75a273a9cd7319401afdcdd4f3d9759c009dea2647969c9289d6de59fe204
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure. It contains numerous URLs, many of which are hosted on compromised websites or disposable domains, suggesting an attempt to distribute malware or redirect users to malicious sites. The heuristic firings indicate the PDF is structured as a link farm, likely to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3852

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=cooling+tower+specification+pdf PDF link annotation
    • http://nollve.com/img/editor/image/file/lokage.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/piramesubowapasa.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/95887401303.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcbba408c0---xedutajapuda.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091839859e2c---winepugixu.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/sopanoxageb.pdfIn PDF document text
    • http://learningkey.org/userfiles/renaso.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/42845353301.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/2304435863.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/kijetusozekerapunajivija.pdfIn PDF document text
    • http://sassyissy.com/survey/userfiles/files/49759594827.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-8-11/20210811030843932586.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/47981976967.pdfIn PDF document text
    • http://holzbau-napetschnig.at/munetaz.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/9d42e3402d4b077430519c3e23520d00/32582927659.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2704d61c---60146906061.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161004318c4d0e---72078317771.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/zikaropapusosunisodu.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/mawubadarejavefo.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210825/1232422201.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f7c05c807---tagizugulesipid.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7bfc57fee---potogupasesekagobevugof.pdfIn PDF document text
    • http://alltechsro.cz/files/56260116135.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb78dac3c5---97652744204.pdfIn PDF document text
    • https://pmms-online.com/assets/file/zorolututemileveweno.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_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 17556 bytes
SHA-256: 96e9eba87593efa650ced3fe906e9931aa14aaf8a2daa2ba3c9a44be0bb98b73
font_01_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1