PDF malware analysis — malicious · e9b47b0c008da7a6

MALICIOUS

PDF

71.7 KB Created: 2021-09-24 23:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 159ad290c676f803c3c82afe623ec670 SHA-1: 27ef55ca424e43c2d773720c251391ea161da280 SHA-256: e9b47b0c008da7a6070d64ed2fd8b9a06da875237ca0a82c83179eab7b3a68cc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to potentially compromised websites or disposable hosting, suggest a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic of using link farms for distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9885

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://smidgel.ru/uplcv?utm_term=download+smart+launcher+5+pro PDF link annotation
- http://musicpark-live.com/userfiles/file/32025389683.pdfIn PDF document text
- http://hoangduy.vn/vn/files/66714141707.pdfIn PDF document text
- https://smartstone.ca/userfiles/files/lilidakonaxozosoriva.pdfIn PDF document text
- http://qhzs88.com/admin/fckeditor_upfiles/file/2021091307015380554.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/0u8ivh04r91b95scvkk8ipqarj/52309946865.pdfIn PDF document text
- https://value.ae/userfiles/file/tikudokerabulososisut.pdfIn PDF document text
- https://cfi-registration.org/buzzboxgift/img/userfiles/files/56974042074.pdfIn PDF document text
- https://elegune.net/files/galeria/files/75683305610.pdfIn PDF document text
- https://leuphuotcamap.com/uploads/image/files/jowip.pdfIn PDF document text
- http://ibarugi.com/fckeditor/userfiles/file/nenaw.pdfIn PDF document text
- http://cargologicru.com/sadm_files/43934566913.pdfIn PDF document text
- http://brmhn.com/userfiles/file/20210909054453_lkfrkn.pdfIn PDF document text
- https://xo-sound.ru/userfiles/file/dunosag.pdfIn PDF document text
- https://luminex.pl/upload/file/43719626237.pdfIn PDF document text
- http://kemnhapkhau.com/upload/files/tosikiderutam.pdfIn PDF document text
- http://runwellconsulting.com/file/file/vepigofopojasafusupe.pdfIn PDF document text
- https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/74499726058.pdfIn PDF document text
- http://triple-a.co.th/ckfinder/userfiles/files/9925701022.pdfIn PDF document text
- http://apsencollege.org/test/fckeditor/file/346817210.pdfIn PDF document text
- http://abwingsde.com/uploads/files/6460313304.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148921938712---40971184106.pdfIn PDF document text
- http://robbymakka.com/userfiles/file/48476594377.pdfIn PDF document text
- http://wittymall.com/multimedia/userfiles/file/vokolugopajolakonig.pdfIn PDF document text
- http://wonikqnc.com/upload/editor/file/1632318845.pdfIn PDF document text
- https://chupwo.com/editor_upload/file/noxegem.pdfIn PDF document text
- http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71423901967.pdfIn PDF document text
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5ae12a6b8---zobolulesokufekufuke.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b56b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB56B	11008 bytes
SHA-256: `b34fc12591de93857754523ecfdb0b335f8a09e96864c10878a76c05ed286194`
`font_01_sfnt_off0000cef7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEF7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e709.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE709	16520 bytes
SHA-256: `8a8d294a539f625e6d6964c127fd1795302ff6116e17143896cc73ee2cc7e4c6`

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