Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56d728b82468705…

MALICIOUS

PDF

62.3 KB Created: 2021-09-16 05:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b485a071a72a60794732eec1d9b62516 SHA-1: 8c1d6c868dad0555e612fe56d5a8afc422c124bb SHA-256: e56d728b8246870571ba5147719582d66f5fe22ffd7ef1d39ca97da6751d903f
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to various websites. Some of these URLs are hosted on compromised CMS platforms, indicating a potential distribution point for malicious content or phishing pages. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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://medvor.ru/uplcv?utm_term=a+time+to+kill+movie+watch+online+free PDF link annotation
    • http://autoneza.cz/UserFiles/File/30729537415.pdfIn PDF document text
    • https://seger.cz/userfiles/file/22150936843.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/xemazururabagup.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/43821c39df76a2ce991ddedbb3c70339/jikuvupaseda.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/kemekixuxokonufapujag.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/76065221347.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/57510123740.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/39957680062.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/24724430881.pdfIn PDF document text
    • http://wirheiraten.de/images/file/patejiburexuju.pdfIn PDF document text
    • https://sainaudit.mn/File/86113865063.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/76770962399.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ca80b8c9bd91ae472e049a1f4cb22edd/66517337679.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/72762618693.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6d168ff60ac6b05bd9a1b151096ed86a/gajewiboxovu.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/83175000142.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/58462698857.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/getadawuj.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/27866843318.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5fdec93a1---dexefuninusajatoxepotim.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/tigozufazago.pdfIn PDF document text
    • https://kapefashion.com/files/files/30259200701.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/59058228302.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109021058538047.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/jenanupogavukigekobofodox.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/bopajapo.pdfIn PDF document text

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