Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ca5eecd60118f5…

MALICIOUS

PDF

74.8 KB Created: 2021-09-12 08:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 187c13f03a24919ed06f073a3da13441 SHA-1: 17c0217bbda818586663983d592317f056e66915 SHA-256: 95ca5eecd60118f5e78e997333968f5c7b98a614400ecaa279cda2c37368ddc0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and a link farm pointing to multiple domains, some of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6016

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ijmscr.com/ckfinder/userfiles/files/xizonagixugumevazazedavev.pdf In PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/35398756941.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/26539517798.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/kagolimafizamovepow.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/49821684186.pdfIn PDF document text
    • http://fructusartis.com/i/File/fiwibedigozekuxuk.pdfIn PDF document text
    • https://jingchengs.com/jingchengs/ckfinder/files/20210905100824.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/vagezadaxuzitoguxem.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b92ca85b2d5a3d12c1ff8631b2fe1899/diwela.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/27909949250.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/38972270239.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/rasutokif.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/90891715581.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210912_62534080C0BE16D9.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/rabeg.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/sunufon.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/968129ee5139729bc044c939075190f5/zegurapepes.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c3c0dd02c---negapawofobubawuvi.pdfIn PDF document text
    • https://jin-hung.com/userfiles/file/bixazitusi.pdfIn PDF document text
    • https://geniodelweb.com/file/60221938344.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321adcc6488---zojimofumefebeli.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/sidegigigifapojifupaduwav.pdfIn PDF document text
    • http://ping-property.com/user_img/files/27358509525.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210902045829.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/gipijubuvirisojemop.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/xulajubagagifasabaxewox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=number+blocking+androidPDF link annotation
    • 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_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 18212 bytes
SHA-256: fd3735562aa10f6774acb71edb0adf4f02d78b66c0c37945c5c98f7aa26ab0e6
font_01_sfnt_off00011505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 10756 bytes
SHA-256: 7f8fa2371c4fc4088105989ef0609a068da254174f1e604b421fdc94b0be0281