PDF malware analysis — malicious · a9a5c0868b483e5d

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 22:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 57c9cf8c11ba4e7660dc5009ce89c3bc SHA-1: a8b0f3be75ebe2a85d519de74402a3ffdefb75d9 SHA-256: a9a5c0868b483e5d9ab477d0697e864dcc3b8753cb4380527333ac8877749834

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://licorne-hotel-restaurant.com/userfiles/file/35834608242.pdf In PDF document text
- https://thinkglobalcompliance.com/ckfinder/userfiles/files/99938397167.pdfIn PDF document text
- https://lavaecucebrescia.it/file/fofof.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16124d6c6dca30---lejitemav.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/iatdhmnojem6ihgo2522eei3nr/91705007184.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160aa256a079c1---7532838414.pdfIn PDF document text
- http://impactpluslearning.com/ckfinder/userfiles/files/21561458674.pdfIn PDF document text
- http://cungcapluonech.com/upload/files/64583188676.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c8eca5bb2a595740f6ed618383360658/garadunapize.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078be59081b7---litawowotovinoluvapodosim.pdfIn PDF document text
- http://www.grupoaccs.net/ckfinder/userfiles/files/49703328562.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ca25b6edflgr0sske8kl9ok782/2680903032.pdfIn PDF document text
- https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/18kmq15r3pdaitjn91ae3es9v6/vazit.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/96d7073385489248ba8ab60ab2e38679/28735769906.pdfIn PDF document text
- http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/66580369219.pdfIn PDF document text
- https://schilderlesvakantie.nl/ckfinder/userfiles/files/90413230713.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160769b71f2088---sedami.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece00c72ed---11340451768.pdfIn PDF document text
- http://sun-tes.ru/files/file/43596870059.pdfIn PDF document text
- http://heathrowairporttaxi.website/userfiles/file/famebigurosu.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760c58bf342---jedoxexon.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16084eee926986---gujobomegabelurinuvusus.pdfIn PDF document text
- http://music-summer-courses.eu/upload/files/mumodotilebi.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d9b4e8930e---23865245042.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608724ab9c6ce---dalevagud.pdfIn PDF document text
- https://spheresignal.com/app/webroot/userfiles/files/94353751638.pdfIn PDF document text
- http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a68dac64b7---45570361348.pdfIn PDF document text
- http://ahchala.com/img/file/petokilevizupuxag.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=radio+gaga+lyrics+pdfPDF link annotation
- 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_off0000e3ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3FF	18616 bytes
SHA-256: `9ca3350acaef6d89fa3ad2eb10d86367a450ae070197a8fd5ae8e72d03c67064`
`font_01_sfnt_off00011411.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11411	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C28	10620 bytes
SHA-256: `b253e511f0e1b21acf5889c610175b5fd1d2901a0a073a0f276ed7ab9a8ddd0a`

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