Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ea0514facc5d8e…

MALICIOUS

PDF

88.7 KB Created: 2021-09-02 17:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 631993632ca019f8146c27b7fafae6d8 SHA-1: 06a737327c9142f9603a2bddd44ac6a35742fce8 SHA-256: 41ea0514facc5d8e5ec087052e5ad86cb9e1443e90b0ebc218c9c6caa14772ed
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by ClamAV, specifically 'Pdf.Phishing.Trojan-d2568dad23a94d95'. Static analysis reveals it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1831

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 https://krisoc.ru/uplcv?utm_term=closely+watched+trains+book+pdf PDF link annotation
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160fad281bf53e---makukotodibuvafibeweja.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce430104ca2---debexixubolive.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082fbb8e83a6---pinademafavezijapopoges.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607994c775a23---91469702163.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/b55856f83aa5c99a357fec5629eefa33/95963503834.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffef821a12---fazaniwixefotutiwa.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/2d6d28e5900555730e77180c715fa40e/padorizerajiniluvuwopogis.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4450808ac1---62762039026.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/29e05e7fba310fe0cb2ffc2d7465bebd/detamivamerelaru.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/fiwedevasovevut.pdfIn PDF document text
    • http://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/4050601445.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/ziparowulegisopadajimux.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f012c453fd0---dawusosupemusomeduzedeb.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c94b85bcd---17542722274.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/64f062a3b18be27e9fe7347519e98f7b/zixobelitudarudefawa.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/a7oj4s1s20lqua3jmb1pd3jl9g/36326533399.pdfIn PDF document text
    • http://ewtch.com/upload/files/26690821473.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/6201842241.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///jatoladibamojare.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/maxoxepasivo.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16074505e0f85b---pawoletikomuvuwolulifisi.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/30715271812.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/40094616866.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/fimebafejigadujovonefow.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210821040235.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/88177700678.pdfIn 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_off0001013e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 19216 bytes
SHA-256: a456d308996abb657ef86b6fec5dfbe68fda1c156dbc994befd40a3943bb327c
font_01_sfnt_off0001334a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334A 11180 bytes
SHA-256: 7050c06a3e940e50f629271e2d746fb99c1ceefa745c043462299fe66d597a26
font_02_sfnt_off00014d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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