PDF malware analysis — malicious · 7f8f5dec4dd37a65

MALICIOUS

PDF

80.9 KB Created: 2021-09-03 01:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: b433ff6d835ac6832d90e717b54eedde SHA-1: d119aaa6881f4c90f7db54753a0e884a3fd502c6 SHA-256: 7f8f5dec4dd37a6582a5fa64b5210446b4c306ea0db5fca12abc176a7b270410

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the embedded URLs are the primary indicators of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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=stages+of+colorectal+cancer+pdf PDF link annotation
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611e7eeb00e8d---20835483552.pdfIn PDF document text
- http://automotiveenergy.cz/userfiles/file/21741760235.pdfIn PDF document text
- http://nm-union.ru/ckfinder/userfiles/files/8410326720.pdfIn PDF document text
- https://habibitoursegypt.com/ckfinder/userfiles/files/dujujodiwodo.pdfIn PDF document text
- https://presstone.hu/userfiles/file/97373479238.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/52d6529464b49385dee6babf2e970f28/43345290747.pdfIn PDF document text
- http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/80978784651.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a3f6b737d---bufobelefizob.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57ef6b2bc2---lunosivemesuda.pdfIn PDF document text
- https://doan295doson.vn/namthuan/images/news/files/77585500670.pdfIn PDF document text
- http://galettedesrois.hu/userfiles/file/zubedu.pdfIn PDF document text
- http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/16507100984.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f818aa96ebe---5789499997.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b0425919f---95519629842.pdfIn PDF document text
- https://sunkamalzemecilik.com/userfiles/file/52445026067.pdfIn PDF document text
- http://www.bluefashion.cz/ckfinder/userfiles/files/52052134313.pdfIn PDF document text
- https://emauto.lv/index/images/up/file/nogadutu.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/p102d84u2qac5fnu6fiob0u55u/94969103280.pdfIn PDF document text
- http://design-klasse.de/ckfinder/userfiles/files/pevokotijon.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/7545462225.pdfIn PDF document text
- https://signika.pl/Upload/file/30337175960.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160746b171f2f8---ruzopizukodetaf.pdfIn PDF document text
- http://poketomecam.com/uploads/files/30044147188.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_off0000dadf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDADF	10780 bytes
SHA-256: `1c9170f9cd0d41607501ccfb037c694956bd3548be7a2e33cad8618ab4f34ab0`
`font_01_sfnt_off0000f39a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF39A	16348 bytes
SHA-256: `d8cde05e7c44ae3e368dfb945f2cc7f8a4531ca75a591504b36b024b1f6534f2`
`font_02_sfnt_off00011dde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DDE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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