PDF malware analysis — malicious · 74a0f85aa1fa08e8

MALICIOUS

PDF

92.3 KB Created: 2021-08-08 11:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02

MD5: f342fe97983ae03453618c7e7ce0a892 SHA-1: ce382f5aad679f13f5266275b41b465a03bf84d2 SHA-256: 74a0f85aa1fa08e8ee10dd663e90caa9a90135bbb8d0c0baebbda3a0e9dccacd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://krisoc.ru/uplcv?utm_term=dragon+ball+z+budokai+tenkaichi+3+pcsx2+running+slow PDF link annotation
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b92077f3781---78312743841.pdfIn PDF document text
- https://agentcctv.com/userfiles/file/68938360209.pdfIn PDF document text
- http://itineraire-consulting.com/ckfinder/userfiles/files/vamawarigobudotamotanakam.pdfIn PDF document text
- https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/7h74a6a7boblat12i8trjoes0f/56868046940.pdfIn PDF document text
- https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f67f858fc---82887164118.pdfIn PDF document text
- http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/7618219269.pdfIn PDF document text
- http://robotsuk.com/luckingbros.co.uk/userfiles/files/98101768055.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c38b475dabe---nifazikijapitowitagifoxa.pdfIn PDF document text
- http://ciccioinpentola.com/userfiles/files/424788145.pdfIn PDF document text
- http://alltechsro.cz/files/futuzigajurafowoda.pdfIn PDF document text
- https://frontivo.ro/userfiles/file/2548046890.pdfIn PDF document text
- http://vtaky.sk/media/file/lisekosuxafapixaf.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e6d275d41---mefutale.pdfIn PDF document text
- http://nineslash.com/user_file/file/27173065113.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c302850f16d---rumik.pdfIn PDF document text
- http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b589f359b1---4081203944.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762a6ea8ef9---rikovepasidejusagad.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/o0ggu9t2t786p30hnebhtd9ig0/54332037745.pdfIn PDF document text
- http://ilovegabal.net/fckeditor/_upload/file/64445347858.pdfIn PDF document text
- https://porterbrothersltd.com/app/webroot/uploads/kazubozilibedosamevilebum.pdfIn PDF document text
- https://giasutainha24h.com/upload/files/boreduwugibo.pdfIn PDF document text
- https://evrenmentese.com/upload/ckfinder/files/10969172685.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8C1	16120 bytes
SHA-256: `09562ca2d5000ae2f2345c4ffb282664df80e6add20478162cc85c395b82892d`
`font_01_sfnt_off0000fe1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE1A	11664 bytes
SHA-256: `e003424eb63ee46c75f81c30d36ca3d15f91ae9d2b870f79c32eefeee742db25`
`font_02_sfnt_off00011992.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11992	18440 bytes
SHA-256: `e4a9c0020700adb245b16ef0d213edc46e7e07083b55f470fd5254fdda17f337`
`font_03_sfnt_off00014aa7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14AA7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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