PDF malware analysis — malicious · 017257d6fcc60268

MALICIOUS

PDF

89.2 KB Created: 2021-07-01 00:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 8c0b0ba0b2890668d58bdcfca025214a SHA-1: dacd9fd220755000bb58ccc9e25a22ccfd2c8f18 SHA-256: 017257d6fcc60268962e06c5e26d10cb8bfe462708e242d0af5e184bf7dfc66c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or malicious redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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.
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://alnahamgroup.com/userfiles/file/jipujun.pdf In PDF document text
- http://ed-web.cz/userfilesfile/xetefijiw.pdfIn PDF document text
- http://beastyenergy.com/userfiles/file/finagilugexabitunopetozen.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609da6eea4128---17290121848.pdfIn PDF document text
- http://zhuoer.ltd/userfiles/file/pulavukuvuxizefuwit.pdfIn PDF document text
- https://itexpertdog.com/upload/files/nuxofe.pdfIn PDF document text
- http://cesishotel.com/res/wysiwyg/file/56608361016.pdfIn PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/eu0konfmt3ilduufiuipb8c8h5/94103214296.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160743e67005a1---fakamus.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/cc6989da08be1808b9bfdb1e17596659/vixoju.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608feff57fc3b---31765569271.pdfIn PDF document text
- https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/jtedkdjnmov5fqr4fravuq4au6/wawil.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/17e043de9a2d03c94307dcf97f865f5f/baniniwosubaladujaguba.pdfIn PDF document text
- http://scro.ru/pic/file/53404838498.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/096e5b52ff026c1f7db21ccbcd136f7a/45954654765.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d75c5760d5---porolidaselisi.pdfIn PDF document text
- http://tjsijiqing.com/ckfinder/userfiles/files/2021/0601/104c985a089995cd0c0864b90d65768e.pdfIn PDF document text
- https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/d245c94bdd28974c4f13fc4933153378/76380063705.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/55326236872.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/73052d4e5b4154e48cf988d2508be6c0/jafezerele.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb57cb78955---80018533986.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2947ad4122---47999560983.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/f984f0081d057fbd6d3379b2a4e7ca72/ravotedegox.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608365b333975---923867413.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c0a4dd944a345cd113d5dc40db31df88/55854545841.pdfIn PDF document text
- http://brmhn.com/userfiles/file/20210519152232_5vufv0.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16091d8ce2ec3a---rotog.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pdfmaker+office+2013PDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fa2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA2C	16956 bytes
SHA-256: `9cad38db3f53f79f6c080daa7ac2b8a53abc33a7f8eef63ead9acbefd6eb238f`
`font_01_sfnt_off00012684.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12684	10780 bytes
SHA-256: `14aabd2a94042121dfb8a0f5f71f456d9277d3b6625ad12da345dd5534c6ad97`
`font_02_sfnt_off00013f74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F74	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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