Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cab12207909f692…

MALICIOUS

PDF

87.8 KB Created: 2021-07-26 20:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7fd2dd217bf94812a7c3c1e714d88840 SHA-1: 44bb1fb8fa3d4d27489f8b01fc60751e320ba5d0 SHA-256: 8cab12207909f69293e665d5d625f5d6b242c7b1f9e8ffd61bff91772b5ef0db
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The document's structure and the presence of multiple external links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://onlineticketreview.com/images/file/54715498592.pdf In PDF document text
    • http://screen.by/images/file/96674213529.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/dixagigapugadopojet.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/2didnrge04olf93olib6n27t8o/varitasojawowisos.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079602d34036---pujezesudabupaniw.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/45646719570.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/vunerodixepufevuv.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/95279db3e9c0a70e379b0e9f84dd95f7/pebezimig.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a51c61d77e3---sawutixenotunup.pdfIn PDF document text
    • http://bptramptour.pl/files/file/32125995843.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/haq63fc80bd6u7469ekeiu8bde/ketosetebe.pdfIn PDF document text
    • http://www.emailposte.com/pictures/41133406081.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/pobuvu.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/19699682047.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f977e08b875---fomapulajufilenake.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/riridapi.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/semamewinezesubawilapa.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ea649b786---vijinetolereloxakurixanor.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/a79b33b347d6781731eacac6e6fde1b4/jesut.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/wururujaxituvipewev.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16084e0dadf559---14687074227.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/88469339622.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/kemavesiwu.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/77186899438.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/2179750343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mathematics+for+business+and+personal+finance+workbook+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 11296 bytes
SHA-256: d511e48137b576c7f955027732ed144e12dc81dae3c6035aa25dc2c55280dd11
font_02_sfnt_off000124b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B9 16816 bytes
SHA-256: a2575a028b54aa38e895ec394d85e4ab3031cc19bfa703971f654c3c5c770efb