Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0ee8cad8f31cf5…

MALICIOUS

PDF

82.0 KB Created: 2021-09-18 20:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ed915c8ec8fcb2adff744c6d22e66616 SHA-1: a01a37370cbcaa0e54752d3eb0727c3d8c1d2bf9 SHA-256: db0ee8cad8f31cf5761acbb280b915f6493055bc7ddd7276af0934a2f69f9e48
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The presence of an embedded JavaScript stream and a high number of external links, many hosted on compromised or disposable domains, strongly indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support this assessment, flagging the PDF as malicious and potentially a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • 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
  • 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 https://xn--fiqa735be48e.com/upload/files/nonugebasafimoges.pdf In PDF document text
    • http://biomehl.com/images/content/files/dojagutosizefazut.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/jorenipetefobokoduvononi.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/zesaliv.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/57583263997.pdfIn PDF document text
    • http://ihdbd.org/upload/files/bupanorivojunus.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/vavebiresufagotenunara.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/dinose.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9c5a4f277350432cce096cf49bdc3b19/11496980002.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/ravononopogagi.pdfIn PDF document text
    • http://retailcop.ca/files/kedesara.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/36913861578.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090617552073499.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/84487607112.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/89088c83cbf2c742724ff0a608170f07/wiganenijogiba.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///58494423090.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/kagedepemanigenamusam.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1631437838.pdfIn PDF document text
    • https://businesslife.com/content/files/revejiga.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/58522011489.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/pukonesunevarinijalirag.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161416e3bcab67---mudavu.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/42819250129.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/77877230785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=wcc2+hack+game+downloadPDF 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_off0000dcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCA 17740 bytes
SHA-256: 39ef63f3e2148ef7acaeb28bea5014df928be511817d9f9064d79ee40152ece6
font_01_sfnt_off00010a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A71 10652 bytes
SHA-256: 972fca06d3da26337a1a86fc13bfdd26b8de59ada198e04cada44fc79d455011
font_02_sfnt_off00012292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12292 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1