PDF malware analysis — malicious · 8accf8bc109ff094

MALICIOUS

PDF

89.2 KB Created: 2021-06-26 10:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 1043189001cf868a131b3c8bd5c50db2 SHA-1: 7b1162e10e968e834af02df7ddb39e61eba3d038 SHA-256: 8accf8bc109ff0949cab96bdbc91bca237e4d28b8589a19b9cde86f3119ccb7c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal that the document functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. These links likely serve as a distribution point for phishing attempts or further malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://laborke.ru/uplcv?utm_term=classic+meaning+in+tamil PDF link annotation
- https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/4c032922bfabe425dcb4166176c3fe7b/15174090625.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701becb56cd---68521112847.pdfIn PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16081425ac65bf---kifupomemufafukerupi.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/652f59d61c62c04403b80bb374a190a8/gozaxefukonazifikate.pdfIn PDF document text
- https://allianztc.ro/files/file/27058769544.pdfIn PDF document text
- http://msslink.ru/userfiles/files/63132473721.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e36302145a---banogelijakuse.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa819ed07c---42247486135.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607432297600b---joxatafudi.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088ca46f0576---nakuxo.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160839ebae7953---zaxitun.pdfIn PDF document text
- http://pierrevillers.fr/mairie_files/file/burepi.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cdaa589b5---63172974434.pdfIn PDF document text
- http://etcad.net/np/upfile/file/jabakiduzifikuxazo.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160700a7eba5b2---7075693474.pdfIn PDF document text
- http://aihyang.com/userfiles/file/4076249402.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/aaim5uhpkm3rbkgao7a5nqv684/17731992801.pdfIn PDF document text
- https://agermag.ro/mm/file/20893436638.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/17c6ed96aa1afc17eb9973e330166645/932003894.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceb340384c---muguripokinojorinaxifilo.pdfIn PDF document text
- https://travelworld.ro/userfiles/file/23544470289.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a628b80d8b---detusa.pdfIn PDF document text
- http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/a16824b98d081178983a6001c252eea7/tagidigusidujaputin.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/wikepuzela.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_off0000f785.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF785	10384 bytes
SHA-256: `fa9604ee7b69b5a4999afbcc6f361f27ea63bec31c237b81acc35e26aa38cd3c`
`font_01_sfnt_off00010efb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EFB	18528 bytes
SHA-256: `a36f0cd06b55e935f4486fca71c745f83fe6fc17c228df7f6eb69e1a76734ff4`
`font_02_sfnt_off00013de2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DE2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.