Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f818f23756e160a…

MALICIOUS

PDF

65.1 KB Created: 2021-09-28 21:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c9b5095a7943418492777f655338b9dc SHA-1: c0c8fcc4fb0a5785c7338566ae8bcabfef1cdaa7 SHA-256: 2f818f23756e160af895f7da42956b3c8b9cd4ad68d32bad51cca3ab0eacb26e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it's an image-based lure, typical of phishing, containing numerous links to external sites, many hosted on compromised CMS uploads or disposable domains. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure strongly suggest it's designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9169

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 65 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://inwebjor.ru/uplcv?utm_term=tamilyogi+2020+new+movie PDF link annotation
    • http://ahdjcm.com/upload/files/18566209584.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210910193619_1979640145.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/gavudekaxokusidaxar.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/71530230340.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/15490367449.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/fekisukijebukiwokiwomexi.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/zewod.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab461225ee---26353365741.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/kerov.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/gimibonugogug.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/81659796084.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/72090364812.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/10475402503.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/nvps5g5lglo1i4scbftn5jv3j4/digedeposofato.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161349cf51436c---96567882721.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/44062629624.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/50736184888.pdfIn PDF document text
    • http://naso10.com/userData/board/file/23720516770.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161387da92867f---72376009674.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161470d4c376b7---55094258823.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/10111322218.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1b98cc929---68815568342.pdfIn PDF document text
    • http://foundlight.ca/home/foun6192/public_html/files/custom_files/file/74185977529.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/86544114749.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_off0000b283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB283 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9A 10556 bytes
SHA-256: e86cd53278c2faef37fa43801d9cb56d46bdcf3fba878858073da280377d3003
font_02_sfnt_off0000e2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BA 14064 bytes
SHA-256: 4ab456866d5670cebfb7f0bb31105fd999c67eb3e685a6861f7471d9b177ab6a