Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2572c4015400ae…

MALICIOUS

PDF

77.6 KB Created: 2021-09-01 16:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a7a6bb7f9031638993ad16b9168d3207 SHA-1: c79e59a7b6201942cee788f6ab9159fcaa4b7112 SHA-256: 7d2572c4015400ae43a040c04f486d1f29f39db40647fe2b47ffd5e996ba4d4c
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to websites, some of which are hosted on compromised CMS upload directories. The presence of these links suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.2081

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://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16091226ed593c---bokabujusosalex.pdf In PDF document text
    • https://allmassage.net/upload/file/20210527195451.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/4025fdcae1f4661172cf136d84f11c88/xosezuzidigepe.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/zilejaxekajamok.pdfIn PDF document text
    • https://bamor.org/userfiles/file/15120925115.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/tixipizufagamaxavamewole.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6571895646---5525283566.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/sivononire.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d27290c1a6558500b1ae53e7a0c1bf5b/86450029648.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/nng0kg9laufmlphsdmnofe932l/12991266089.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/dasezipiro.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/xavivipurefujomisaxuz.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/13761627014.pdfIn PDF document text
    • https://alpinashop.bg/files/67850008521.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/5801477614.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/zurinuvutit.pdfIn PDF document text
    • http://enricobarraco.com/files/99386385989.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720644124ca---18777621396.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160def3a513b73---sejedububukufi.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/12697108685.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/xijagesopegefakizujo.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/ruxixewatigamoxatanibu.pdfIn PDF document text
    • http://ballard1966.com/clients/22636/File/57724552492.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/tuzepoliwepaganuwovido.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/fe6029a57e28c458fb1504a56e143088/86341530907.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085905b1faf3---gujasabovunutijut.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/padevuneranawutekigino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+last+witch+hunter+full+movie+onlinePDF link annotation
    • 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_off0000e3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DA 10816 bytes
SHA-256: ec720f26e62bc3b1fab14d087eb502018562df42a88d41af2c0f7199c1615fb5
font_01_sfnt_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 17500 bytes
SHA-256: 3595b4b1a47cb778cdc29cfffcba8aedd4f47ddadc8bda00c0e84852f5bb08ee