PDF malware analysis — malicious · 0e72aa5daaba3121

MALICIOUS

PDF

73.2 KB Created: 2021-09-05 17:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: ee23bde17dca432957da4c0c631d3d1d SHA-1: 5e704fb64025cc941a3ba710d50d6aa3ba4a4fb2 SHA-256: 0e72aa5daaba31217451aef3e59dac2f679dec481022bb89318bdb0f859c9bf5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a common phishing or malware delivery pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://medvor.ru/uplcv?utm_term=tamil+homeopathy+books+pdf+free+download PDF link annotation
- https://addsfly.com/userfiles/file/87893726991.pdfIn PDF document text
- https://clinicscrm.com/img/files/rureviz.pdfIn PDF document text
- https://chinese-wall.tw/upload/files/rogebanuverube.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/45543502850.pdfIn PDF document text
- https://iltuosarto.com/file/nakakefivupopemi.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/m23f76nij82dnhvdiaqqaf6ap3/91163759113.pdfIn PDF document text
- http://kolbiko.com/images/uploads/file/6621678319.pdfIn PDF document text
- http://salt17.com/userfiles/files/pifinubezuvisapez.pdfIn PDF document text
- http://www.oiseaubleu-promo.fr/userfiles/file/sugivujarotokerufi.pdfIn PDF document text
- http://teusz.pl/UserFiles/file/84943004402.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9bd548a47---tenuk.pdfIn PDF document text
- https://kaisar168.com/contents/files/80574614135.pdfIn PDF document text
- http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a22bca646115938607ed95377f3fd5de/46954346902.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/92993592371.pdfIn PDF document text
- http://xn--49s538bo8ux8c.net/userfiles/file/87992260710.pdfIn PDF document text
- https://augsburger-dartliga.de/uploads/file/65285522324.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e60e27faf---5712992809.pdfIn PDF document text
- http://gro-felix.si/uploads/jazezenire.pdfIn PDF document text
- http://fatename.com/uploads/files/202108171136056604.pdfIn PDF document text
- https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076f5b39303d---7632896148.pdfIn PDF document text
- https://vietrocknet.org/app/webroot/img/files/1021452432.pdfIn PDF document text
- http://www.ecostroyservis.ru/File/78225201319.pdfIn PDF document text
- https://sabagdasarov.ru/upload/file/jukidegad.pdfIn PDF document text
- https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/45auhpjct7t3pet0nmekgtrcnm/kuzedejagopavanatafezo.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_off0000b4e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4E7	18788 bytes
SHA-256: `0ef403846a7a2cdf8bd04f791f67fe0b1c824c05ae4dac45e45042805dde0750`
`font_01_sfnt_off0000e567.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE567	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fd7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD7E	11156 bytes
SHA-256: `34add02cdf54ccc989a6cf796303ef318a17db66f93e39aadfe545beb90afb02`

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