PDF malware analysis — malicious · 6b01115f97e36929

MALICIOUS

PDF

84.6 KB Created: 2021-09-01 10:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 2f99879e34e59a0a78857cc0b7decab3 SHA-1: c2770cf7134c1eba2bcda5cb1940621bcdd99110 SHA-256: 6b01115f97e36929c3f4ddeea9adacaf6516fb6b9b52e886b3fa7883bf3a48f9

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also includes numerous links to external websites, several of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9c42d9715---varumupofogenixe.pdf In PDF document text
- http://rallyteamwalraven.nl/file/71202572645.pdfIn PDF document text
- https://torbay.ru/images/uploads/file/93700838426.pdfIn PDF document text
- https://kp-bs.ru/upload/files/9650576466.pdfIn PDF document text
- http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086c9256dc3d---tezetaxudatexefag.pdfIn PDF document text
- http://rbc-bezorgdiensten.nl/upload/kupijiluzasedija.pdfIn PDF document text
- http://technoculture.cz/admin/upload/file/gewodojemif.pdfIn PDF document text
- https://photofetimages.com/28651923206.pdfIn PDF document text
- http://taketty.xyz/js/ckfinder/userfiles/files/mozubedafe.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/nulirogawodigavibi.pdfIn PDF document text
- http://levne-pohary.cz/UserFiles/File/76564514180.pdfIn PDF document text
- https://aihr-iadh.org/uploads/FCK_files/file/71167366318.pdfIn PDF document text
- http://elitsatodorova.com/uploadfiles/file/32113851160.pdfIn PDF document text
- http://lamelove-zakryti.cz/userfiles/file/72238980076.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/h3t030nn3umstdrtfba134n5ff/55063954134.pdfIn PDF document text
- http://thaimassageboy.com/ckfinder/userfiles/files/68996006506.pdfIn PDF document text
- http://baobianhkhang.com/upload/files/94723676848.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/g6kpr88d35r7il03u2f6k77cti/lazusixujakezemubefetosup.pdfIn PDF document text
- http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/71841525016.pdfIn PDF document text
- http://bkdesign.ee/userfiles/file/58666209208.pdfIn PDF document text
- http://hawaiisushi.iorderfoods.com/uploads/files/44880019839.pdfIn PDF document text
- http://gazosilikatnn.ru/uploads/files/pewimegebirevoxavelukep.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/89920020792.pdfIn PDF document text
- https://bem-sa.com/img/file/9972258589.pdfIn PDF document text
- http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105091911507076.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f7d8bd721f434d1764d967e06ab49874/1802940532.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=brussels+sprouts+meaningPDF 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_off0000e45c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE45C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fc6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC6E	18548 bytes
SHA-256: `97f5a28f4ee8092b8866597894a722909088d407d68c651b31d42e2684a05079`
`font_02_sfnt_off00012bdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BDF	10748 bytes
SHA-256: `968c260845fa3b45ef47cac67d3c58b95133d2c5003bd6f9d73943f17cd8d184`

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