PDF malware analysis — malicious · 2357299df21ab59b

MALICIOUS

PDF

86.0 KB Created: 2021-08-16 20:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: cd07670a85159cc6470fbc512bc5359a SHA-1: 312920f3bf55f7cf4c68471668908a0fc832b86c SHA-256: 2357299df21ab59bc449c5696f50a8b8e0281537d09a5bf1d9899be43bc700af

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://queure.ru/uplcv?utm_term=why+did+ahsoka+have+white+lightsabers PDF link annotation
- https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/f940b830df5a4f3e12f1b5b85a1246b0/7259359511.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0c99456a0---radapijakifatam.pdfIn PDF document text
- http://n2nlah.org/UserFiles/file/83341847529.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/b3a17c298b2986c495f1033bb3346679/11194707837.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d95787afad---12169474334.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8bc8055a8359c43f42ae1f4eab3eff05/33081504131.pdfIn PDF document text
- http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815686d0148---zarovesugawugomifa.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a52d76822f---norolumusujekiluz.pdfIn PDF document text
- http://olgapolyakova.com/files/files/relotazuzuxesedakafumi.pdfIn PDF document text
- http://skiflogistics.ru/userfiles/file/fisikafudokukukugovizeta.pdfIn PDF document text
- http://gift-founder.com/archive/upload/files/rotibezorafub.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/44e9af9999ad608548d6f27989a03518/63329781829.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740d80cb6be---80267134448.pdfIn PDF document text
- http://redhillplantation.com/clients/1/1a/1a02e1fabf1298af97853074613e4b20/File/naxewenenodadez.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c631db8995---90391465204.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed4f1ca8f3---2056724295.pdfIn PDF document text
- http://www.petercar0937494634.com/upload/img/files/3641749079.pdfIn PDF document text
- https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d48b52cc2---jiganoligibasovukimiv.pdfIn PDF document text
- http://graciaindoutama.com/kingkong/userfiles/files/wegibebefilotojuboxu.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a3eb5fe9a---52900447920.pdfIn PDF document text
- https://zemtechnika.lt/public/site/0files/dupuwajuropatabe.pdfIn PDF document text
- http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160848f777c825---59842766112.pdfIn PDF document text
- https://hram-uspeniya.ru/ckfinder/userfiles/files/lafosibe.pdfIn PDF document text
- http://rockpapersun.com/upload_mce_image/file/bedidolaziw.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b19d1c4726---19030888762.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_off0000ed3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED3B	10912 bytes
SHA-256: `4447955ec09448309eba40758d98c6b6f1e15865a686c2095c176ad613b1a75c`
`font_01_sfnt_off00010681.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10681	16612 bytes
SHA-256: `d4967794a3931d42e00dc3be4ff64bf4039edc2ebd07fa6c0b2a2ca30b646f44`
`font_02_sfnt_off0001316f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1316F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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