PDF malware analysis — malicious · 649461bd6f6f5a62

MALICIOUS

PDF

86.2 KB Created: 2021-09-21 02:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 93bed559562a8644c16cceb6c6af0da3 SHA-1: b5a178d4967d9d66ae0217ac9e08196f08e08b4a SHA-256: 649461bd6f6f5a62a909b6dfdfb6568e6775b36da7771755ca070d836a6e348b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS uploads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm, likely intended to lure users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://synerhu.ru/uplcv?utm_term=sales+and+distribution+management+by+havaldar PDF link annotation
- http://tnslib.net/userfiles/files/jujedagilubopus.pdfIn PDF document text
- http://abwrosedale.com/uploads/files/37030905072.pdfIn PDF document text
- https://f27szerviz.hu/upload/files/ditedejoxenukebu.pdfIn PDF document text
- http://dispensapertutti.com/userfiles/files/xukibuloxig.pdfIn PDF document text
- http://gaushalango.com/uploaded_files/userfiles/files/52745861220.pdfIn PDF document text
- http://labonguyenhoang.com/img-chamthi/files/72608402930.pdfIn PDF document text
- http://paitoonbox.com/userfiles/files/zajib.pdfIn PDF document text
- http://kstarsmall.net/userfiles/file///vadunewoxi.pdfIn PDF document text
- https://angkaganjil.com/contents/files/gifabokulof.pdfIn PDF document text
- http://wrtour.com/FileData/ckfinder/files/20210917_37C0836FC15D5F4D.pdfIn PDF document text
- https://rovetco.com/userfiles/file/83976585845.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f919f0f2c8---26466994103.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ef11442cdcb9b0fb68d9a4d7e4bd13fc/91099617880.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1a968f159---fuwakuxen.pdfIn PDF document text
- https://mediaskills.rs/files/2965821151.pdfIn PDF document text
- http://accessprecision.com/userfiles/file/gufejasonol.pdfIn PDF document text
- https://vidaleve.net/ckfinder/userfiles/files/24820869117.pdfIn PDF document text
- https://marjoyunlar.com/calisma2/files/uploads/kovelowiratirafomup.pdfIn PDF document text
- http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131587685709---xarukatuzatosogofag.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb101cdd68---dojenu.pdfIn PDF document text
- https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/zajazemugodupa.pdfIn PDF document text
- https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/194e4e9b33a659c165c446b91ad28e1d/86382475709.pdfIn PDF document text
- http://oipipleszno.pl/userfiles/file/piwixexa.pdfIn PDF document text
- http://freehajjandumrah.com/admin/admin/uploadfiles/file/94462803929.pdfIn PDF document text
- http://superfasttv.com/uploads/files/butuxufesinobom.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_off0000e895.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE895	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000100a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100A7	18540 bytes
SHA-256: `62420edf195dabc3ebfb41743a582acba54e6f027a88386e1ae0328bb6b4c56d`
`font_02_sfnt_off000130f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130F0	11192 bytes
SHA-256: `8061a03024bbe0a009516d6987166e29baa136c8272c0e7c59d55c70ebbc90cd`

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