PDF malware analysis — malicious · d7165dc7ae61937f

MALICIOUS

PDF

92.7 KB Created: 2021-07-14 02:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: f65b0355f419b7e1b62553f87a15d8be SHA-1: 2b73f87b15a96f0cb4d0773ba839856c5e6d399b SHA-256: d7165dc7ae61937fa7b6ce67ce036c4d3d825b0bc7f72711bc82b0889c3d08bc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/218746df078effdabab57e4760868df4/tegesaw.pdf In PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a9a5684e88b2dac08360b36c8e4b366e/bibimod.pdfIn PDF document text
- https://bem-sa.com/img/file/lemasune.pdfIn PDF document text
- https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727d80a0dc---64649335432.pdfIn PDF document text
- https://limblength-sldf.com/userfiles/file/pikokuvowabifat.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfad6fcdab8---92280555716.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c66bad3350d---viped.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608799b18ab07---ratezewin.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/7fafa29b26fa10af3fdb60f5d162a83f/39532511266.pdfIn PDF document text
- http://kinocosmik.ru/sadm_files/19414348239.pdfIn PDF document text
- http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/95dd3b937b1ec4a9c723c5d9fcf35064/vepos.pdfIn PDF document text
- http://sibinetweek.ru/userfiles/file/313766273.pdfIn PDF document text
- http://uitvaartverzorgingsindex.nl/images/uploads/4999454359.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a099c356538---12382252735.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73f68fded---75520621985.pdfIn PDF document text
- https://kipass.fr/userfiles/file/63486755763.pdfIn PDF document text
- http://bsl-trans.ru/admin/ckfinder/userfiles/files/leraredusuvevogufaxirikiw.pdfIn PDF document text
- http://labonscafe.com/userfiles/84728966783.pdfIn PDF document text
- http://vmkmsz.hu/userfiles/file/27486884237.pdfIn PDF document text
- http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6608b7021---zituxunigabo.pdfIn PDF document text
- http://ottotech.center/userfiles/file/jirutu.pdfIn PDF document text
- https://yukkumpulgroup2.com/contents//files/49899579261.pdfIn PDF document text
- https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/d0e4eb5bb31f4540ad6491ffcf3851d6/53288250572.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30cfb9aa3a---niworal.pdfIn PDF document text
- https://discoverthesky.it/file/85661117368.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+reproach+in+the+biblePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1AB	16060 bytes
SHA-256: `5df435387ac48e1fb7374a8ab8af505d147268c4ac2215304735704443421aa4`
`font_01_sfnt_off000106b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106B9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011ecb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11ECB	17012 bytes
SHA-256: `8b3b5dd0e0984820b7568dc549e298e2d8b77b3e214a0d00c8c5683f461f1804`
`font_03_sfnt_off00014aed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14AED	10724 bytes
SHA-256: `326c2a5b30e055ef3f8e8ce421a44eed117f9449138b994a4bbe4a9957541895`

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