PDF malware analysis — malicious · a06ff3bed0e87665

MALICIOUS

PDF

86.8 KB Created: 2021-07-04 01:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2a6e0f7524e1a0648bb7da52bf924703 SHA-1: 8d001df08a66bdbb5424283e446e1cebc39d87a8 SHA-256: a06ff3bed0e8766573bd251e1ca1a8d9e153e39300c0c882f4d665d61f151fe1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and the nature of the linked content strongly suggest a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://cructi.ru/uplcv?utm_term=how+to+put+two+pdfs+side+by+side PDF link annotation
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/r7i8fo0asd82b8ri3ltenp00b2/73876924457.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb03bb98618---42771309067.pdfIn PDF document text
- http://laulumaja.fi/ckfinder/userfiles/files/wetafunuw.pdfIn PDF document text
- http://ceomit.com/fckupload/file/46563597802.pdfIn PDF document text
- http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160beec51dada7---zigemipirusepozegegafoxa.pdfIn PDF document text
- https://gastriklandsbf.se/UserFiles/files/zugamupekoxodevukepobiku.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16085b388811a0---bigubuxojevazopuwe.pdfIn PDF document text
- https://bdcomunicazione.it/file/masapeliwirozonizimavip.pdfIn PDF document text
- http://alimentosldm.com/userfiles/file/sotanedejusimopogi.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6a60120eb4a8da4ab66bbb04363ab72d/vixuxuga.pdfIn PDF document text
- https://chp-travel.ir/data/file/sakaw.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e913eb620---molivazejososadu.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078c6076b9b8---5655372028.pdfIn PDF document text
- http://aliceinformaticasrl.com/user/pages/jatuzogitumubavozid.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/a09673ad33da3a9cefa04c8cf767f9cf/71022072656.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608977dccfd7b---lopujab.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077788f73b17---5987020963.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608849e9220d1---56204646632.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d47e2dc38---48016830314.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a872d6946---nijupuwi.pdfIn PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a75e94f593---pejevekofexibixutaka.pdfIn PDF document text
- http://zzweien.com/d/files/wipebozawexagijujowexug.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/5c23853738ea23d646c700d331123941/tirefabilopavitogagekeni.pdfIn PDF document text
- https://nevisnews.com/userfiles/38863800153.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082df5b311a0---relem.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_off0000f1ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1AB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000109bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109BD	17052 bytes
SHA-256: `dfeff837aa0fc41cdaf52a5ac20d8f3893068b2d121a931a6b1508124a4fdaa7`
`font_02_sfnt_off00013615.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13615	10508 bytes
SHA-256: `c74956d3eda26fa92539617094a7fbd894ed502d6dfbe681a42c589699e62ad2`

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