PDF malware analysis — malicious · 58ed6d365b7ed46e

MALICIOUS

PDF

85.7 KB Created: 2021-09-08 07:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 9b84932731e51c8cf792adae5848d0e4 SHA-1: e2093847e16518205d145f8901358977d6426f74 SHA-256: 58ed6d365b7ed46e3eec1ecad889f8eb12195a53093f28c2a882ecd4476b057e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely serve as redirects to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=ludovico+einaudi+nuvole+bianche+piano+sheet+music+pdf PDF link annotation
- http://clinicaveterinariamontecchia.com/userfiles/files/suxurupazopekoxoximower.pdfIn PDF document text
- http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/konetusazijixawigoragox.pdfIn PDF document text
- https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ae68bc582e5c85d25879dc67f4ab8843/kedegeg.pdfIn PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/ne617bscqoahpoal7qfga8pd31/pakugivez.pdfIn PDF document text
- https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/9ef5098583a0b09f5913d220e9b49b23/geket.pdfIn PDF document text
- http://nyitotthaz.hu/userfiles/files/94225168342.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/loposubuzerewunaniwo.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f5ba5fd6d415323c083cd61a6b51b39b/pisuboko.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160eff72a7c2e8---8223671894.pdfIn PDF document text
- http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/93435543919.pdfIn PDF document text
- https://shreenathtechnologies.com/userfiles/file/87006052383.pdfIn PDF document text
- https://promobryansk.ru/userfiles/files/80932725012.pdfIn PDF document text
- http://influences-vegetales.eu/assets/Image//files/wusuzevaduza.pdfIn PDF document text
- http://bizbecho.com/pa/trainstation/uploads/image/file/80081763996.pdfIn PDF document text
- http://drthchowdary.net/userfiles/file/83007162489.pdfIn PDF document text
- https://instalacje-elektryczne.net/ckfinder/userfiles/files/54802025620.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/e37367a9153ae21a794cd26de802fdba/vuvigirofamuveg.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd4f3c4061---13901972029.pdfIn PDF document text
- https://makanbanyak.net/contents//files/12312655206.pdfIn PDF document text
- http://vinhhangvien.com/upload/files/sajezugabudi.pdfIn PDF document text
- http://fredericjean.net/oplusco/file/vakixamis.pdfIn PDF document text
- https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/f9lc38625curfj1gr9r9vicgf5/ladomekenuzupijopimiz.pdfIn PDF document text
- http://madmojo.com/fckupload/file/87734452983.pdfIn PDF document text
- https://cowik.pl/upload/1376588494.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_off0000e548.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE548	11048 bytes
SHA-256: `b43c25cafbc05da74fd8edc7e939249f05890cc6bb26150075ad26414c829ed0`
`font_01_sfnt_off0000fe98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE98	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000116aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116AA	19064 bytes
SHA-256: `af02550bc7c9db1548413b82f50b48ee9578bec28ffcf6b5c78567203f6707a1`

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