PDF malware analysis — malicious · ba93fcb05f4fd011

MALICIOUS

PDF

90.3 KB Created: 2021-09-01 20:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: e613a8e8c2efdb66edbd9f1032fef765 SHA-1: 820bd25ea31be4dd22d5efa415642845cfc36429 SHA-256: ba93fcb05f4fd0116f46eb5efaea5c4d082e5da729bb1764a9ba598c87639503

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, and the structure is consistent with a phishing lure or malware downloader.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

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://crewmak.ru/uplcv?utm_term=ytc+price+action+trader+review PDF link annotation
- http://korea-seals.com/ckfinder/userfiles/files/lekulosovasusubil.pdfIn PDF document text
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6498ba3d0---zobavafolukoxe.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b96b8bd2e1---dojekekulixokiwesofaloni.pdfIn PDF document text
- http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc972ea7e6---dafilupotibenudomu.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b82f5914df3---mulidu.pdfIn PDF document text
- http://consulcongress.it/uploads/assets/file/titena.pdfIn PDF document text
- http://centralgiving.com/media/userfiles/file/7806373138.pdfIn PDF document text
- http://fini.hu/userfiles/file/zufelil.pdfIn PDF document text
- https://wagaskar.com/media/99202542815.pdfIn PDF document text
- https://tezerwatch.com/file/upload/files/07-17-08-42-04-82.pdfIn PDF document text
- https://infoenergie-loire.org/userfiles/file/kemog.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b83197f5ce---zagijesulofisofibowuri.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/cc9cd625aae308a4aaba262d0eb9538e/wirezopobiwobe.pdfIn PDF document text
- http://aerotechgroup.ru/img/outer/files/gurugiwotalanutenar.pdfIn PDF document text
- https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/noxamenudorivanujab.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd424a8a64---62258589832.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/u8uqvnu510u19omn1efgaucem5/22314847365.pdfIn PDF document text
- http://suliaox.com/v15/Upload/file/20217201130348090.pdfIn PDF document text
- https://gtselect.fr/ckfinder/userfiles/files/rajomiwixujaluzab.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/33fa344726a395a3a457ac7b1a0f07d4/remegavugitugi.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/h2gteof579pdcmed3qioa0g6p0/549085831.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/ab9062eea298975368c131da368cb71d/34144512472.pdfIn PDF document text
- https://prtl.pl/userfiles/file/pamawetegorutadot.pdfIn PDF document text
- http://royalrep.com/userfiles/files/sojaruni.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c664c57ffe---66434745009.pdfIn PDF document text
- https://alpinebadmintonacademy.com/ckfinder/userfiles/files/6357056273.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_off0000ed11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED11	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010523.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10523	23000 bytes
SHA-256: `c5651d366c93254c1d044a02e548da421320509f2b1f0992983a0fb213895542`
`font_02_sfnt_off000141dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141DD	10428 bytes
SHA-256: `82491374f72b376b18d1029bcbb738cd2daabb02680da16323db6b909735ec20`

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