Malicious PDF — malware analysis report

Static analysis result for SHA-256 225689c65899587a…

MALICIOUS

PDF

77.6 KB Created: 2021-09-09 06:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4342ca4a5fc2c10524ca5d9e00f09312 SHA-1: 1a7e97c4c5e4809db77cf8e5d21f8ab82a48c684 SHA-256: 225689c65899587a18d6cf2a46a12928479457d05ec99cd77ad2ff15dffd05a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and contains numerous links, many pointing to compromised WordPress sites. These links are likely used to redirect users to phishing pages or download further malicious content. The presence of multiple external URIs and link farms suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://coretry.ru/uplcv?utm_term=botim+app+pc PDF link annotation
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613074c0cc243---dunoratefupalaxuta.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/nejejexinejimefenamit.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/fikinoxivawu.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f97f84ccb---wanoza.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/tosijumezatopoxe.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/163045350148272822393.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/xunowekizefose.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dc632c8e9---gaxegogapog.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/84123741005.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/jipovuwirikurelebogod.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/93714031456.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356ddb72fb0---tuvabewukiru.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/zipimuxodovod.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/livoz.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/mukadibogelobajobezodinaw.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613852ad32d31---tufosofanivalodir.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/bivom.pdfIn PDF document text
    • https://rafautama.com/uploads/file/pepekiz.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/takagof.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161329d3b6e64e---49794443671.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/22487940147.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/34230425489.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/jabividutotibumaveseferuz.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/35142908014.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/lezomepekuwogurekub.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/40230107268.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_off0000e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05A 10040 bytes
SHA-256: f0f02362e590adc578c5ef0ab9209ad72b1588ff4bee30d6204f4b30bdebbe68
font_01_sfnt_off0000f6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B7 17576 bytes
SHA-256: 3f159d97af895ef9e2d1b973fd98fe69469dfaeff4caab74a48495571f61bd2c