PDF malware analysis — malicious · 7e6a14688a2390da

MALICIOUS

PDF

74.9 KB Created: 2021-09-03 11:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1be7bce8c714204a414ecf5b29e9edc1 SHA-1: dfc8cf4632df799169c3751a8825cbc747d3a492 SHA-256: 7e6a14688a2390da176c0f0a8c8bacdd8743309e504877d89b43f73bd984a49a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics further supports the attack pattern of luring users to external, potentially harmful, websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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://archism.ru/uplcv?utm_term=saeco+incanto+manual+coffee+machine PDF link annotation
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b5546d8ffc4bea4f2c4a373759a6d83b/69292167262.pdfIn PDF document text
- http://dogable.de/userfiles/file/19344674898.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/7rtqdkid8rotgpocqq7bbp7cmb/vikaximigujun.pdfIn PDF document text
- http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/mimurubatotupamufe.pdfIn PDF document text
- http://sotel-perm.ru/site/file/61708258048.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c742cedb2550cac2e0eaae45924d444e/63929418325.pdfIn PDF document text
- http://ettermanenterprises.com/ckfinder/userfiles/files/2967680066.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c5b5ead0a---6863311162.pdfIn PDF document text
- https://lamaisonducoeur.ca/upload/editor/file/porefibisubobakovu.pdfIn PDF document text
- http://bearings-home.com/userfiles/file/funaxelugaritafomed.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c8ec09a0af62e23184a937670b5efe2b/gijedilamifewedov.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ad24cdeae---sumimolalibimowavomosi.pdfIn PDF document text
- http://ashioke.com/images/library/File/davusebogofi.pdfIn PDF document text
- http://clean-ecology.com/Upload/files/lidalitip.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610731e164fc5---61903581664.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d64dbdefe---3358614349.pdfIn PDF document text
- http://olech-rzeszow.pl/userfiles/file/kamedere.pdfIn PDF document text
- https://adasms.fr/userfiles/file/zaxinumavuburola.pdfIn PDF document text
- http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/pibesamilemizaf.pdfIn PDF document text
- http://streathamtaxi.com/survey/userfiles/files/9605977613.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/69j8cdcl8s9pkk5bloke1rqmse/93005151338.pdfIn PDF document text
- https://aihr-iadh.org/uploads/FCK_files/file/vewejupenavudejunafabo.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd28b75952---pewekuniso.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_off0000c26d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC26D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000da84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA84	10508 bytes
SHA-256: `e1585a491badb0d6dc16e727ff0a7dace1faa49525c23c59f6723f404cfd9c6b`
`font_02_sfnt_off0000f22c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF22C	17088 bytes
SHA-256: `0086323fd03461eea63d10d6ce21e470232967f8bf4e0a0b0eb5f5bc90b2e293`

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