Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f08887d05dab196…

MALICIOUS

PDF

70.3 KB Created: 2021-09-05 21:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a3c3ff102206c043745b1173a657cd0d SHA-1: 30257fd7bb25de49c4c64ac678896c12f103a351 SHA-256: 6f08887d05dab1969427ad1f79eccd96cab24a189bc2e303cacc02be8d280724
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The presence of these links suggests an intent to direct users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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://philabc.ru/uplcv?utm_term=vodafone+kabel+deutschland+k%C3%BCndigung+vorlage+pdf PDF link annotation
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/26566510804.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/9628124036.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5868292d2c---figugibigegefasogi.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/10730683775.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/mifulegedujosu.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/kigugogibuvupenojesud.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/2186895013.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18ad710e45---47717787600.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b682dbad5a6---jimeselamavobi.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/bebowitekikugotinodilire.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/20259718834.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/9d83b51fad7345a5c5d859fb295ebe2b/66082706095.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160831c51f2c15---67110700116.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bf58279f7---nuloxudekubufuzadisat.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a766968c412---sijunabufej.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/baxetojakitaxumekowepimow.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/ganazibenuzuketutuluvi.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/wafor.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/96094974348.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c951bbac327---52180202278.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5dfec0269---22292232030.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ac57cda2e---mesupoluxilurazex.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/lagafusoremumimiwegifudem.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/39682044849.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/53742766409.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/32909354938.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_off0000c1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E8 17396 bytes
SHA-256: 7bf7fced0dacf29a08f73b52897cb8e3e7b96df91adc3f042e15f4d16ee18c7b
font_01_sfnt_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1