Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada9821586274ed1…

MALICIOUS

PDF

97.1 KB Created: 2021-09-18 09:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a514ef6fa734f01a0d17144d0ed9d799 SHA-1: 4f7b8bdbef9ce970c84852a85c52dbdef5e10410 SHA-256: ada9821586274ed15ce9f1ffcd02cf9835aec0a59d80396ebb3efebe8a336e06
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier clean score 0.2015

Heuristics 5

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=configurar+cuenta+gmail+en+android+imap PDF link annotation
    • http://sgrappresentanze.eu/userfiles/files/27314274332.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/vagefeva.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/sajizuvikewe.pdfIn PDF document text
    • https://adikkedua.com/contents/files/lufupunogubekukojisutim.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/umn1usrhp755nlum4k0o3tj1h0/patejefefilabugesewabezi.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/fojak.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/l2etloe6eo6670dsnni18prb9d/52497974204.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc6aec2090---85777191904.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/pasapuziwevijowunozosotu.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/molizipusalila.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/13314874786.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/30792109524.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/volovagogupot.pdfIn PDF document text
    • http://gerocuki.hu/user/file/forajuvagizati.pdfIn PDF document text
    • http://banquat.com/userfiles/files/gidebajazi.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/10059075276.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/31394741800.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/161315b9da4cdc---43014314315.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///20620669400.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202109141607068181.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/17085233205.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/tetuliziwilifil.pdfIn PDF document text
    • http://tes-sys.com/uploads/ckfinder/files/20210912/16314031369609.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_off00012227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12227 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3E 10928 bytes
SHA-256: 49bbe9b9144187d9bf9bdc447d601f411d32a0bc6b1afbc87873cea0cb439550
font_02_sfnt_off0001535c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1535C 19916 bytes
SHA-256: 3afee3817f7b271d25561b20abf5083c83b433be289479abb8ec4d211e15f649

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