Malicious PDF — malware analysis report

Static analysis result for SHA-256 a987c3f68514b3dc…

MALICIOUS

PDF

63.9 KB Created: 2021-07-08 21:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c68e15c74a31c8c84864005bcf026dd1 SHA-1: 6294adf969672dbdc2bc99290af2a01ffa887a7b SHA-256: a987c3f68514b3dc9841f4383e7b197b23129cae5470e4a7ab48f1271246490c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via a link farm. The embedded JavaScript is a common technique for obfuscating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8378

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac11a00c80a---tagavezovi.pdf In PDF document text
    • https://tecnibat.net/uploads/archivos/68167674546.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/54894192173.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eff444d3d---39476244158.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/katakixokilinakezazulojo.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/ximok.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210628012644.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/md12sh5qlou2dsng2n7rfsusod/72883445308.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/iar2ep01v7ltu313uhc6qpf2i4/panatafodozomalopobukar.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee1611db5f---17586892103.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/984a643677d7ceda803b2c332c364014/7916614806.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/13ed568f9562d952d0553b9c70f0315b/94582778384.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e47e6bfe1---nuxox.pdfIn PDF document text
    • http://novichiha.ru/pic/file/womosinibuzaduf.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/15650719841.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16077909a85af7---37437755900.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607852a0dcaa6---xazesanavemifeminixugim.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210503082621452565hwpu9p.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/93831909857.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a986cf889a7---zarope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+find+treasure+easily+in+minecraftPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 10928 bytes
SHA-256: 5b64e21d85c0c2bffddbf1ec442d00c919ba23ac57b2002002da685e2b49d68a

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