Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba1d1ae33eb5356…

MALICIOUS

PDF

66.2 KB Created: 2021-09-07 12:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d863ecbc173e47b385f7c6d479195c60 SHA-1: 3acfecdda38ebef65dbb3f8378b82a8684c97399 SHA-256: 7ba1d1ae33eb535653844e8b17d94b435e5b35691da514af3cdc5df44830281f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, forming a link farm. These URLs are likely intended to redirect users to phishing or malicious websites. ClamAV detection and ML classification confirm the malicious nature of the PDF, suggesting it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

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://catamma.ru/uplcv?utm_term=business+plan+for+rice+production+pdf PDF link annotation
    • http://eastindiaspray.com/suvra/eastindia_spray/files/90054794938.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/32200434032.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608005f60083b---jigibetorapiburi.pdfIn PDF document text
    • http://17njl.com/userfiles/files/12296629017.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/52942719948.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834d289c853---85400680600.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/1582910172.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/3535602961.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/93127782173.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c08dc25ddb9---tuzawexutitimatarofevelep.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/59783218842.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed70118206---74270196812.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/bopunolajubuli.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/7ba41c58b0e2fbd4ce2c26dde1f9de0a/xovigubozezifogexigidis.pdfIn PDF document text
    • http://22743333.com/userfiles/files/veripibifedif.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/8h45clb1lhsi7ncllpfvitj52a/gejelenoxowonanes.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/746a91cb45d6fa05e66904f097a9d7c8/72236992107.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/6589fiueakhtmmqo3lhoc88au0/kipoked.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/79325477151.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/gekevorugi.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099fb5b2d5c2---40849519971.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-8/20210508181440816574.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/19429093255.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710df13f092---90495675037.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_off0000d30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 10764 bytes
SHA-256: 67443c62269048cf951e7ca7f9faf62a1d68de2934e71fe81e56d06d04c1f868
font_01_sfnt_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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