PDF malware analysis — malicious · 0e9701c3bcdb1ed8

MALICIOUS

PDF

88.7 KB Created: 2021-07-04 03:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 64fa352e406d794caec5138b230c955b SHA-1: 67636d13fcf4dc0d9461ee83afb6ac33b209ab5e SHA-256: 0e9701c3bcdb1ed8a1d50187ae9c736b1e7961faf168e0822aea0163d24f106a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content or facilitate phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to distributing malware or leading users to phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9558

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://coretry.ru/uplcv?utm_term=words+that+rhyme+with+enough PDF link annotation
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/kargmu3bljr567312e73g3c9d1/21773261328.pdfIn PDF document text
- http://chataphan.com/file_media/file_image/file/53884512870.pdfIn PDF document text
- http://interel-rus.ru/test/sites/default/files/file/xotixive.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/kfouotrbp1chth2m54nd13om2v/94618679870.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce54e76aa7---88875101435.pdfIn PDF document text
- http://sh-ruiyangcpa.com/userfiles/file/2021-6///202168104841409.pdfIn PDF document text
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947f786254c---25422638407.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/157b47cc5ec769c32872d3d7ae7f0bab/96637155077.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/d5bcf855ec6d152339accdae896f62ec/19866556339.pdfIn PDF document text
- https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/4ccf9ac6fa353d9c6ad82c82d00a63de/netezupi.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160baa3ff3d072---92281346838.pdfIn PDF document text
- http://haciogullari.com/depo/sayfaresim/file/80751576833.pdfIn PDF document text
- http://uniquecharacters.com/upload/files/wonekoxadolotiximurokib.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d03760b7470---49429680022.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/b3512ea38f2011e729b62f7c68e17bcd/98327821690.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ab15407d4---71582504586.pdfIn PDF document text
- http://anandtouristcorporation.com/uploads/nutaguxafivivi.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cae56fa0742---tajenitiwaxidelasi.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/mijajizujajetumalo.pdfIn PDF document text
- http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/c71455a2068d19ac0be7d6ee3a0725d8/fasovogor.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eda980c4ec---56055025217.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/53de17b7baa100ec84941c07cbcd5a9d/23567371669.pdfIn PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/94eb9cdefa5f04dc67a4187537ea33ec/lopoponabeda.pdfIn PDF document text
- http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1777e2a5b---5542671562.pdfIn PDF document text
- http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ac8025015---79687255174.pdfIn PDF document text
- https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d08117d1db2443cd5e06839199ab7f1a/20603749897.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off0001368f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1368F	18328 bytes
SHA-256: `d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60`
`font_00_sfnt_off0000c458.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC458	3464 bytes
SHA-256: `a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff`
`font_01_sfnt_off0000d1d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1D3	21180 bytes
SHA-256: `14e3879b949ed3832f8282eb2eee77ad8df227c675873ea8e30fd7a89e891d6e`
`font_02_sfnt_off0001056c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1056C	10944 bytes
SHA-256: `3cd8dd093c101da9bbeee04603310ca1f4ae5925b017c8d82c45c3ddb8f4a9b7`
`font_03_sfnt_off00011e7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E7E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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