PDF malware analysis — malicious · 39145b1d9f00b1d6

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 19:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: a52a92eb4d98bd4371121bcf6387349f SHA-1: edccc0c13debd9dedd5775ef028acc0b44a3bcc7 SHA-256: 39145b1d9f00b1d6b8cb7d7c4ea5c7f048edd54db4ba3deb30023808f8149baa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content or visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613791e4d7e2e---dibipiri.pdf In PDF document text
- http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/95541749289.pdfIn PDF document text
- http://www.s-prom.si/fileupload/file/zulekuxelifedaposumugew.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161382f970f79d---35488403283.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f6a188fa5610770e97f2c51765b6b9e0/99444661035.pdfIn PDF document text
- http://lesen-und-schenken.de/userfiles/files/5731123432.pdfIn PDF document text
- https://sunpower.lv/ckfinder/userfiles/files/robitalijit.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f375e964cc---47476362327.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a3dcd6a09---40802091431.pdfIn PDF document text
- http://pokemom2.com/uploads/files/wofarojefiwowadibedof.pdfIn PDF document text
- http://hzyixiangchem.com/upload/files/16631231652.pdfIn PDF document text
- https://maintogelonline.info/contents/files/58122883159.pdfIn PDF document text
- https://karaari.leaddeehub.com/userfiles/files/tetugi.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/f37b557823cdccdd7c0cda6b4bf75043/17578317177.pdfIn PDF document text
- https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/l3vej0d37vq0v9lev24t0sl1me/kiborujesupup.pdfIn PDF document text
- http://sampoernastrategic.com/uploads/image/files/tamifedugete.pdfIn PDF document text
- http://salt17.com/userfiles/files/rezezorotovugoxesufureg.pdfIn PDF document text
- https://mimpiindah168.com/contents/files/remirifejubasasafuf.pdfIn PDF document text
- http://manegedebuitenwijck.nl/uploads/file/47491033113.pdfIn PDF document text
- http://urbariatprasice.sk/upload/file/61784548425.pdfIn PDF document text
- http://hnht-electromagnet.com/d/files/bibifeseliwofolubejok.pdfIn PDF document text
- http://didaconcept.com/admin/fckeditor/file/kezime.pdfIn PDF document text
- http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/29039406953.pdfIn PDF document text
- https://leanuslab.com/UserFiles/file/6746595082.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=windows+10+download+full+crackPDF 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_off0000d833.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD833	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f04a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF04A	10684 bytes
SHA-256: `1dc50946972100b04b274cd185a6d6b03753b107da365f8fe8478154525b91f2`
`font_02_sfnt_off000108f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108F9	16872 bytes
SHA-256: `6e313f8de80e1b8453978cf05824c7fd6c9db0fcc62cfbf96e28e0a29a4c3faa`

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