PDF malware analysis — malicious · c07222e9de96abf7

MALICIOUS

PDF

79.9 KB Created: 2021-09-03 20:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: a59516eb0f54381dc8abffb79c44b750 SHA-1: d6142eb4498265b40e5c7a57b332cd548b47a671 SHA-256: c07222e9de96abf7948a6c29ebcd7fd6054a3fe25da7caa2dad88697e5805da3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, directing users to numerous compromised websites and disposable hosting domains. The embedded URLs, such as 'https://smidgel.ru/uplcv?utm_term=baltimore+aircoil+cooling+tower+installation+manual', are likely used to distribute further malicious content or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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=baltimore+aircoil+cooling+tower+installation+manual PDF link annotation
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7e67vtn218pl6peid6msj2er74/wifasun.pdfIn PDF document text
- https://eclearusa.com/images/file/18651281049.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607beb46350c6---nilisudakijukinuridoja.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebaeb18e6d---gefapipexosojaz.pdfIn PDF document text
- http://guowangcable.com/d/files/magusaludatamonabuf.pdfIn PDF document text
- http://slp70.com/clients/873855/File/parezozoxepotowu.pdfIn PDF document text
- https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/f7505d7f9118fb287630b2fc1fab6c62/78309543898.pdfIn PDF document text
- https://ijieet.org/ckfinder/userfiles/files/78940971920.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/d095747d82b3c46d4d7092b7167f76f3/pidijin.pdfIn PDF document text
- https://palcev.ru/userfiles/file/20561962396.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c8065aae2cf76287e17eb2c1885b3649/29910170423.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/ea273d5029eba09466872057d850b514/53644194143.pdfIn PDF document text
- http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/remofojux.pdfIn PDF document text
- http://chromavials.com/d/files/55358603976.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ae32f7db---42895301618.pdfIn PDF document text
- https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/955e1a8715e1a15099c7606ec2c045bc/kekusulebup.pdfIn PDF document text
- http://k1a.ru/images/files/file/65034824926.pdfIn PDF document text
- http://trevorhannant.com/39857692537.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c900e7ed25---dupodivafixagoseduketipa.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/40547e0a8097fb5358d4a2220a573383/96460925659.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/c9c8d902fb68b883d73f78b704e860e7/33804912209.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e516ad271bb---fekubamimudinomatavisija.pdfIn PDF document text
- http://penzionnakrizankach.cz/ckfinder/userfiles/files/dududolikomeliza.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/bc45c87ffc5e3922fa5ff5949ff52b91/50853729658.pdfIn PDF document text
- http://kangshi-you.com/uploads/files/202108260954378876.pdfIn PDF document text
- https://vieclamhanoi247.com/upload/files/23977451770.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_off0000ce8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE8F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e6a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6A6	10812 bytes
SHA-256: `a6cc712617feae743314d84b8d390f92ec03dc5fd4fb6aef4fc4087df38daa44`
`font_02_sfnt_off0000ffb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB1	19336 bytes
SHA-256: `ac32d7d4825e4e34a70fed63d41a654b538056558676501d34d2f4da16a34d97`

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