Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0660bd4638c65e…

MALICIOUS

PDF

68.3 KB Created: 2021-09-05 01:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f4f1cee0b77a4cc1587d3fd46fd1cfcc SHA-1: edc5819ccd5ff27edb85dcb04244aad1ed6c06f0 SHA-256: 5f0660bd4638c65e0f9302e28b7ee931b4ac8e2185bc8f333d9ab5d5fd7a34c9
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. The presence of numerous external URIs, many hosted on potentially disposable domains or compromised CMS uploads, reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

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://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/3537aa979040946ea07ae6f8b93d213c/pefatometajika.pdf In PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/02b2f3ec353993c51e1b48eae5505b09/88923366367.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/93b4081e00d62ab8d9a7ae07caff52e7/kerefojivuwidojafefifaxa.pdfIn PDF document text
    • http://forspeed.cz/ckfinder/userfiles/files/susimofurasepuko.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/sajofuvilupeguzesomiw.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/nd9ufsdprmje0m8rfvo6n8cgm6/76200498638.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/63054090556.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/d82740d8075498b5b29e088cdcd022a5/13400856678.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d88a3d948fe6d481d249011d99b5f93b/79807110084.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b57e1bc74a---3444811047.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607564072be60---59109135324.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b06a98491e7---jajava.pdfIn PDF document text
    • https://angkagenap.com/contents/files/39461399846.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/4574c220bf03f852a4a1eb10de414077/46077421386.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/93216649996.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/29499565398.pdfIn PDF document text
    • http://asfalon.com/__files/file/pidujeloruw.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16090337a5a67c---talekuzunipoduk.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/15446935631.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/fodabevenukorotetitodosim.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b352e07005f---48171739271.pdfIn PDF document text
    • http://bostonmentors.com/userfiles/file/banabokobonemufozinogiwuw.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/ae7fad71f49cae59759174e35619657e/fuxidopugokurowibusexada.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/larak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=variety+rice+recipe+in+tamil+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1