Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a403eb5d7d724f3…

MALICIOUS

PDF

79.4 KB Created: 2021-09-06 15:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 14d21caedfb8cff4d90df6e4993320e2 SHA-1: 5ea5ae700b51883ee9af081bfe068a1c2ad7b4a4 SHA-256: 6a403eb5d7d724f345f08c5ec5a4c556fddd2f6fa917b443c2f6ac6085b1e28b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a primary indicator of malicious activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608212375b20f---jirelite.pdf In PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/vjsvcl22mo7sfrr23m0r5fo7b3/buvimuvep.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/xugafugidigirujoj.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/kadebufef.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be5eb5b5513---kusojijedirajugapovafiwe.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/95228255796.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/4nu1bekischo103t2t9ikbmv40/82576035303.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de5363ea9e---23230045359.pdfIn PDF document text
    • http://anindecor.pl/files/file/lanur.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/samivatak.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078477ee0c6a---10578891204.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/5824687182.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/46847060846.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/gidonukiwogut.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/45850254576.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/11181748174.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/wopolujuwodox.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/77f9038d5632e8cfae5b19329eb4e34a/bawodesipinorutiretife.pdfIn PDF document text
    • http://ymmicro.com/files/files/tixubemik.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/12317248a132eee1259a58f83aebadfd/pogizaberolipeperovivo.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/16764493dfc59fd59034f267f440ff18/20215639522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=2012+bmw+x1+owner%27s+manualPDF 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_off0000d1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FD 10740 bytes
SHA-256: de6c4e979d7f019e03e92f99360d3f2f1d1241012514baa817e9a47818850113
font_01_sfnt_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 17360 bytes
SHA-256: 196c87c37ef5647bb06d9cb627da4202cb9c27cfaf4dd7a0b695fe30d43b7a1f
font_02_sfnt_off000117dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.