Malicious PDF — malware analysis report

Static analysis result for SHA-256 509183141da73e56…

MALICIOUS

PDF

82.6 KB Created: 2021-09-03 20:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d2c99c1b51973ebc61e15a56f4d7058f SHA-1: 3379f47ba9d7e2ecfc44e8608df4c5b9f524b8c4 SHA-256: 509183141da73e563268c90ad4655b67ba7fd4f4d96f5f4093f387672bb0e833
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://medvor.ru/uplcv?utm_term=perimeter+of+rectangle+worksheet+3rd+grade PDF link annotation
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cacc6feacf1---goribelezapifewuzu.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/d9db6941dc17df68435714b8764161f1/83104815008.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/risepojuf.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/34174659938.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc018273e---vabodanolatumukij.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/onctvkinqfisfj3orh5j6d3sv7/65637012440.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/87056735669.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/febixumazotis.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/felarepokubiwitogefudabe.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d4745f909ec9de5758b73ad180717b65/79768498221.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/93081146114.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/77772873778.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/bazoxujik.pdfIn PDF document text
    • http://1982thsreunion.com/clients/a/a8/a85c6617a93da1462bf6c3e7dda9c043/File/62882990206.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/125a0150b5f6d250f19a13d54e689260/97848599164.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/88982498987.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/vibajolimosijureginerev.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608483cba4877---favote.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/94188801699.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e68d50480a---6066349985.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161168535ab53f---xeseretuton.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077a97a8fd8e---mojinedofonibadozimiwu.pdfIn PDF document text
    • 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_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 17648 bytes
SHA-256: d32f72490f3abf7627cba23275182b0ac19d1880a8ce119c779a0eb57c6e6bb6
font_02_sfnt_off00012266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12266 11272 bytes
SHA-256: 74b2effdf61a033d57a07cb5b4bd77a9ccf0468d0c8036544ec7e3ba85a0e70e

Open this report in the interactive analyzer, or submit your own file for analysis.