Malicious PDF — malware analysis report

Static analysis result for SHA-256 0954e8463a446c44…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 12:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0fe7ef5318ab991a274f05184986261a SHA-1: 70e3f71ed09e0e7358cbde3da1189eb8318d8369 SHA-256: 0954e8463a446c4461ded7f8a35835e702d43739671c2e15c6d4f997357a0a87
164 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains embedded JavaScript and links to compromised CMS uploads. The presence of JavaScript suggests an attempt to execute malicious code, likely to redirect the user to one of the numerous linked URLs which appear to be part of a link farm designed to obscure the final malicious destination. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb0de06b359---18716840517.pdf In PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c2415349---gatodidokanilalumamo.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/16171990739.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/9148915208.pdfIn PDF document text
    • http://101balkon.ru/upload/files/14107425181.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/4035340588.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ca4bcbf1719b6d9cee04856d504c6fa1/74274709170.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a2875aed2283b3954f1edd274cc8279d/11588666210.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f577d2a757---jevenezugizo.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dodararutovil.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/62vjtdd6fbkec6on7f1j55bn6g/38348004610.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16118d03bc18b4---zelerademufisudaxolir.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/jumaxopexupexesipekefo.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/begavibatizaraxebivek.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/gemufinegarovo.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a042c30bd25---46394526467.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/31315438517.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c4d1d2488---jepapubisuv.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/94906942443.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/13654914333.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/2e4j2hqlqs7jabo07kba2tqocs/nivinakijurewesug.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/tuxepozararosivumujile.pdfIn PDF document text
    • http://www.sctiec.com/up_files/FCK/file/vugag.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f5d6f712---makawudesabar.pdfIn PDF document text
    • https://bmat.mn/uploads/ckfinder/files/kimotumugefivawomoxafe.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/bibepowajiliwazepexom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=learn+spanish+lessons+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_off0000ecb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 16460 bytes
SHA-256: 2d09fd67a3659536c93e628b7f0449d893c1af36f0d0528f8b5db5be86ab2978
font_01_sfnt_off000116df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DF 10452 bytes
SHA-256: d005da20a03116058907a0748331f9f5920fbe5cdb2dee5da041102d7050154a
font_02_sfnt_off00012e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1