PDF malware analysis — malicious · 3327eea0779e3a2d

MALICIOUS

PDF

72.9 KB Created: 2021-09-02 05:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a8b666bacd336e078ac82dcb36b2886a SHA-1: a3489fff6300ec8122e343a376918b3d19b2bd17 SHA-256: 3327eea0779e3a2d7b5756fda5d1c1f317b2a85b543e60fa400124f099940ca7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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 http://accessiblevehicleservices.com/userfiles/file/61356507607.pdf In PDF document text
- http://vagtteam.dk/userfiles/Files/90269737702.pdfIn PDF document text
- http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26793129097.pdfIn PDF document text
- https://aarhuskortet.dk/images/file/nezojilavobenofazozusor.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/mlua79jftnmihfd451euo6rjo7/70676638586.pdfIn PDF document text
- http://xboxheerlen.nl/userfiles/file/87921995463.pdfIn PDF document text
- http://praguetransfer.com/files/file/kavaxireguxojaduxiduf.pdfIn PDF document text
- https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/tufaxagetepagewiradi.pdfIn PDF document text
- http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/58502548183.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c18e07ee813---84818305482.pdfIn PDF document text
- https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/oobo17bbqn21hcctjkr2ijn4gm/xitiguwevuv.pdfIn PDF document text
- https://eminencesolutions.in/resources/userfiles/file/6095531665.pdfIn PDF document text
- http://premsaktidal.in/userfiles/file/situla.pdfIn PDF document text
- http://www.pranabkumar.com/fckimages/file/pesabumelizoxugewewasaw.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/80f6dc60a8b7ff15fa2dda4b54e82722/vefukoborileguwexijebi.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/5067f0440c2a321b7bac4f543104559e/vifafosawolekifidivinofew.pdfIn PDF document text
- http://maslag.eu/userfiles/file/pelabidikida.pdfIn PDF document text
- https://afra24.com/basefile/afra24/files/5812052218.pdfIn PDF document text
- http://scpt.it/userfiles/files/80947186450.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/05cb81b496d335e05842f7edbdc92934/24933083931.pdfIn PDF document text
- http://csc028.com/userfiles/file/20210617182356_o207dx.pdfIn PDF document text
- http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608caf2067212---7518952559.pdfIn PDF document text
- http://dancephoto.ru/userfiles/files/xosonoxedet.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+make+hard+shell+tacos+in+ovenPDF 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_off0000bd6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD6B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d57d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD57D	15420 bytes
SHA-256: `e945bfe61d69bc5144964f5a29673653cf8667da89f95de9d85d4e5840dc5984`
`font_02_sfnt_off0000fc49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC49	10868 bytes
SHA-256: `b3b34bf2945b358c60f2a6b929fe25fd6a073967e06dcc40580d865e6578f218`

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