PDF malware analysis — malicious · 1e9026181ef9728f

MALICIOUS

PDF

89.7 KB Created: 2021-08-11 23:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: c996430c1222adb17eb4f4f809fe2e37 SHA-1: 670326e2de1303570cdd72f50c5c3b91a5460593 SHA-256: 1e9026181ef9728fb6d400caadeb203dee75a0731f9d647ad0706f8be75e16f3

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 document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9986

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://allytemp.ru/uplcv?utm_term=what+should+i+eat+for+intermittent+fasting PDF link annotation
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/lfoki45egmni484ojulgkv9s00/42168070845.pdfIn PDF document text
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e346266658---46612786897.pdfIn PDF document text
- http://yaqeen-eg.com/userfiles/file/64719719447.pdfIn PDF document text
- https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/925c75121e515478c25137634855d963/43048732019.pdfIn PDF document text
- http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607c46c3d7bcc---gunewiposeminararonewa.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160de808f0a484---88751607505.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160865b3e1fdd4---junirowofipu.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f005d8b6daa32d602d4c974627a7c9ba/48487226696.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee204b538---68429485054.pdfIn PDF document text
- http://mikailang.net/userfiles/file/20210509031744_495031648.pdfIn PDF document text
- https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/0bb412731cecf039b07437f1b7d09225/tetaxo.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/47d15660c805148d0243f25950b9d8b6/60964106237.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f936e4194---34826801485.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c76899f6a---39364081580.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b58f07060---tuxukojogisezirodomej.pdfIn PDF document text
- https://asthasupermarket.com/userfiles/file/kivosov.pdfIn PDF document text
- https://rivaflo-south.in/userfiles/files/21484764483.pdfIn PDF document text
- http://studiolorenzino.eu/userfiles/files/19106452994.pdfIn PDF document text
- https://ymvii.com/admin/upload/files/67460006798.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/4qb4sndl3o0h6r3lll2c83juum/jalotekuloti.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160eca5630df57---lavedokomo.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c671ee95415---josalesovurifakibagozus.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160986b0b4e160---lulubu.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_off0000f983.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF983	17088 bytes
SHA-256: `db29d3836bfeff4abedaa31c62b9fa6197dc75c5e0fecf0127708a97e9085672`
`font_01_sfnt_off000125ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125AE	10896 bytes
SHA-256: `b6ec229ee9adf9ace05a5ad4085534148694c32913cb0fb49e494f6ec80384a9`
`font_02_sfnt_off00013e7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E7B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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