Malicious PDF — malware analysis report

Static analysis result for SHA-256 06265d00c822744c…

MALICIOUS

PDF

59.6 KB Created: 2021-09-24 12:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b9629e02c50ac0388d112e2e9446d654 SHA-1: 3b3a4de170f7713735566760f80685b077675c69 SHA-256: 06265d00c822744c8236de7e8fc9da5e50761f0990e45207dddb268f35a2a381
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URIs, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6508

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=ghayal+full+movie
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/49990032192.pdf
    • http://aptekarynek.pl/zdjecia/fck/file/99195755980.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36e7f4127a54c9822ef232619c44e1d1/givesobagafanalitimoka.pdf
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/femebiv.pdf
    • http://kcpsystem.com/userData/board/file/16293246670.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/riramoxenumekaluxu.pdf
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/51046047268.pdf
    • https://onderhoudnlgarantie.nl/upload/file/11619539116.pdf
    • http://abwlargo.com/uploads/files/begorivifenunexijo.pdf
    • http://amadpich.com/userfiles/file/lamebedezowa.pdf
    • http://damnoen.com/ckfinder/pho/files/54349343203.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469f2b40760---2896412293.pdf
    • http://radio6deenero.com/uploaded/files/zululamezesabexomiser.pdf
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9816749115.pdf
    • http://cdkkck.com/uploadfile/file/20210916073227.pdf
    • http://medical-1669.com/userfiles/files/gesajikijirikulu.pdf
    • http://cristal-in.fr/userfiles/file/8307929395.pdf
    • http://smflow.in/admin/uploads/file/68537196021.pdf
    • http://osmed.cz/app/webroot/files/files/vadidet.pdf
    • https://mebelihome.ru/upload_picture/63879017606.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161313f1b4e186---morevodirubus.pdf
    • https://icrs-as.com/userfiles/file/88660901567.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143601330f3d---gamajofujosevokugojoforu.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aead.bin
2ff3e905b64e6f41314dbda7f623cc6dc7f6552cab3ea020494d4503b82ccd48
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAD 15348 bytes
font_01_sfnt_off0000d599.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 16792 bytes