PDF malware analysis — malicious · 47b06fd9355ad3eb

MALICIOUS

PDF

79.2 KB Created: 2021-09-01 03:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 31ade3341a8ec775ca8a8eab6d0a46f5 SHA-1: 56e6305fb6c1a2bcb3b3aeb4a7298262efc5ac07 SHA-256: 47b06fd9355ad3ebc5c166aadd046fd9c42698e76811d80d89414db3078efad0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body was unreadable, but the heuristics strongly point towards a phishing or malware lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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://medvor.ru/uplcv?utm_term=1st+puc+english+textbook+reflections+pdf PDF link annotation
- http://land89.com/ckupload/files/74664320898.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s7sa42deuujac7si2s2ok2req4/rovupajozuxor.pdfIn PDF document text
- http://www.web-globus.de/ckfinder/userfiles/files/kubotivexobuxogusugixil.pdfIn PDF document text
- https://augsburger-dartliga.de/uploads/file/30950425550.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073f712e66ad---29582526322.pdfIn PDF document text
- https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66a88cdb1---vonologixevufifutuvogaxu.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610e01d0aa2b8---29734289885.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/2462c4c96c79670dd279b839e8c9badb/54059373892.pdfIn PDF document text
- http://softwarefactory.nl/images/file/7356798934.pdfIn PDF document text
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fac7f3dba---49118913920.pdfIn PDF document text
- https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a4bfb3839ddb11a29df22354e74608dc/79511461579.pdfIn PDF document text
- https://msiutilities.net/documents/61840699777.pdfIn PDF document text
- http://www.prieteniitehnicii.ro/documente/file/9046709684.pdfIn PDF document text
- https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/kofawurusiwazuzovi.pdfIn PDF document text
- http://wangyiphk.com/userfiles/zuvonukafid.pdfIn PDF document text
- http://happysmilecard.com/uploads/files/79512919313.pdfIn PDF document text
- http://weighlessthisyear.com/ckfinder/userfiles/files/99159025547.pdfIn PDF document text
- http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/55466310808.pdfIn PDF document text
- http://noospc.ru/SITE/files/editor/file/wunozu.pdfIn PDF document text
- https://newdesert.pl/userfiles/file/kelozoganumovolaruron.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cd92ae865---39205266415.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d28392d68---9964588553.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/a547f527f4728a3863d19342536c39ba/lipituxunelokum.pdfIn PDF document text
- http://safedoorsystems.com/cmsimages/file/57475464472.pdfIn PDF document text
- 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_off0000d07b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD07B	11124 bytes
SHA-256: `a69912d212885b7b1f4e1227ac36f36d9224e6e1da3fed10dc1aeee4e420b17f`
`font_01_sfnt_off0000e9f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9F9	16972 bytes
SHA-256: `c5b84f2db0ce72459da80050c0046040952a29328be719d8b565b819967e5b0b`
`font_02_sfnt_off000115f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115F7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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