PDF malware analysis — malicious · db7c93fe29241b03

MALICIOUS

PDF

95.0 KB Created: 2021-08-13 19:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: d83a0e4641bc3964fd3207e8a1b2539f SHA-1: 38ba6e921c34863c05e929eff3a9bcbbab452f4a SHA-256: db7c93fe29241b035f7cf5ddb8991a405ed5ad2d6dfea71d7f91f53e9705126f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristics indicate a phishing or redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9726

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://gulfcoolcontracting.com/uploads/userfiles/file/file/jovefutanimigurebar.pdf In PDF document text
- http://liebherr-tr.com/userfiles/file/naxusazatalobevufimomerew.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf5793b8ea---zixivududafukakuzegex.pdfIn PDF document text
- http://effektfilm.de/files/file/33159638746.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2c1f69905ab82f4634b4b73765d8607f/33787897159.pdfIn PDF document text
- http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lipiguwuwoganudug.pdfIn PDF document text
- http://guojingmall.com/userfiles/file///razowiloguritig.pdfIn PDF document text
- https://winpoasia.com/ckfinder/userfiles/files/wujetati.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/d30cf8bc310bd3d22c8fdd91b16394ee/82742446086.pdfIn PDF document text
- http://alhouti.com/userfiles/file/mubuw.pdfIn PDF document text
- https://renesens21.com/ressources/upload/files/2200086951.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607258f73a4df---59056192108.pdfIn PDF document text
- http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/47466801492.pdfIn PDF document text
- https://best-label.com/upload/files/23183266665.pdfIn PDF document text
- http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085e6454f2f7---revibatob.pdfIn PDF document text
- https://angkorphotographyguide.com/userfiles/file/zavesademesibe.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7v7bhoqqf8kdkru1qdg436i772/negafigero.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/969106b083fb9fb56865f998c814e821/romojefigedimoniji.pdfIn PDF document text
- http://hvpeds.com/upload/contents/file/bukugufapemelejiwepana.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/9tsrs5m4fcc279682vbu3ia7h2/burinebemen.pdfIn PDF document text
- https://datajournonepal.org/files/85495651958.pdfIn PDF document text
- http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/50588891840.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c35ba61104---80201536479.pdfIn PDF document text
- http://pcwenhua.com/uploadimg/file/1628333812113143390.pdfIn PDF document text
- http://mopron.ru/upload/files/91189786684.pdfIn PDF document text
- http://daisytalavera.com/userfiles/files/80249824180.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=best+sensitivity+for+pubg+mobile+android+no+recoil+2020PDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f309.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF309	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B20	11680 bytes
SHA-256: `fb98e3baefbf810cb4030be1ddb4136ef43ef3e199cc09762aa37bca8080464a`
`font_02_sfnt_off000126a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126A1	17468 bytes
SHA-256: `1e44157e01d77cdd57b49984c29aeb40aa3983a7709d6bca98e71dafc923ebb2`
`font_03_sfnt_off000154fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x154FC	17044 bytes
SHA-256: `d50c12cb9bc1b08f853cb358ad4ad22f0f8e727fb1a0a0eaac466ae3c7d63512`

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