Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab886b201c935c5…

MALICIOUS

PDF

62.5 KB Created: 2021-09-29 09:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d0ab6b5674d90558d2f14594613366b4 SHA-1: 8e6367831e29b6466ca50aaeb299418179dd0d56 SHA-256: 3ab886b201c935c5c48c6a94c02d219f95d45227415dae7afcfb2b0ed7308cb2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of UTM parameters in some URLs suggests an attempt to track user engagement, likely for phishing or to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7195

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=mp3+splitter+android PDF link annotation
    • http://labsshop.com/d/files/86773194297.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/91173bdcbd2e33dbc87f1d9aa0e649ca/fogexere.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/930157687613c564b8afca.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133bc1e07d46---81215031671.pdfIn PDF document text
    • https://www.vconsole.com/ckfinder/files/nedatojifatugejutid.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/7lkpe4g1ddrr0jk9q09e1ivq02/70460736901.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210925_FDB188DEE5F931EA.pdfIn PDF document text
    • http://vizcsap.hu/files/file/resot.pdfIn PDF document text
    • https://avflash.nl/upload/files/ritibolasowe.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/28841618071.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/43778765812.pdfIn PDF document text
    • http://www.agot.pl/upload/file/mujemiwuzimofelulag.pdfIn PDF document text
    • https://subarini.ro/mm/file/razofivi.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/kiwagovarexovu.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/midasuripapapetabisom.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/6781388348.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/77406754134.pdfIn PDF document text
    • http://t-cso.com/upload/file_folder/file/romexulimomom.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132828a1e613---75643371084.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/4631652379.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4e6f4234da8370aa38a5ae31529b85fe/94708293666.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_off0000b427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB427 17848 bytes
SHA-256: b0f606320d2fe4d4db84a2f36ca6ca9ef8a7a6e4ebd1940d9464c9854e259e9b
font_01_sfnt_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.