PDF malware analysis — malicious · 9feba4f29cb956fc

MALICIOUS

PDF

86.5 KB Created: 2021-07-04 00:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 011a1c16b068e33b18348791331053f0 SHA-1: 2129376db5a2ac31465de8330273ed32a21f0593 SHA-256: 9feba4f29cb956fcf5f7b73be8ad6dc1c5a6aabdb94f2c007ebf35b5f96c1f76

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm with numerous URLs pointing to compromised or disposable hosting, suggesting it's used to distribute phishing content or malware. The presence of external URIs and link farm heuristics confirms this behavior.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 http://gpszone.hu/upload/userfiles/file/18890547111.pdf In PDF document text
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b1fa7120---4976045397.pdfIn PDF document text
- http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77472119162.pdfIn PDF document text
- http://angelescare.com/userfiles/file/zagejajoradonegusikuvan.pdfIn PDF document text
- http://maihome.hu/admin1/file/farasafojib.pdfIn PDF document text
- https://muzeumkonstancina.pl/attachments/file/26846212214.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079601de07bb---61940757499.pdfIn PDF document text
- https://wagaskar.com/media/zigojixugijuziwabasawex.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096913441edb---wajiwidili.pdfIn PDF document text
- https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160819eec295e0---49860236920.pdfIn PDF document text
- http://gdlianyu.com/uploadfiles/file/5133616352.pdfIn PDF document text
- https://aluminiosarla.com/userfiles_arla/files/74774919613.pdfIn PDF document text
- https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/4d1ff67d7c465d84167671b38f4f413f/88461698067.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/f92nle9if2vnevj628i1iefl4t/19274010696.pdfIn PDF document text
- https://fibaquitaine.fr/cebatrama/userfiles/files/valutemekezobuf.pdfIn PDF document text
- http://maydangson.com/vietkiendo/upload/file/93839588719.pdfIn PDF document text
- https://prtl.pl/userfiles/file/89383402324.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rdcesbfre2rgii4g1vp1im0q11/mogezos.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b71cb1eb7---98173270994.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b292c74071---36734871646.pdfIn PDF document text
- http://kpotplace.com/uploads/files/51617980318.pdfIn PDF document text
- https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7b3a088c1c918c8dada3cceeaf155bdd/95298099839.pdfIn PDF document text
- http://ebslang.net/_UploadFile/Images/file/fadagipumofubuwujib.pdfIn PDF document text
- http://spc1991.com/ckfinder/userfiles/files/64113307937.pdfIn PDF document text
- http://poorclarescork.ie/images/jokonadibedejazuxejisa.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=interpersonal+skills+appraisal+commentsPDF 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_off0000f028.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF028	16440 bytes
SHA-256: `41bf17902003cd42cf505917bc152c6705cb9b9350323c76d9cbf419aa892bb2`
`font_01_sfnt_off00011a6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A6C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013283.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13283	10580 bytes
SHA-256: `432736dee7b8c973e57d08d32d48d1c8bffe7b8235f4e17d33e178dac4ed1c95`

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