PDF malware analysis — malicious · 7cef270556505dc4

MALICIOUS

PDF

105.2 KB Created: 2021-07-06 08:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 61fc9ab57d76eeda13630ec71d444ea7 SHA-1: 7cfac829d0591e051ffcfb768e39d87ff967b826 SHA-256: 7cef270556505dc4bcb9ac079df4edddfb5340cc30684ca3dfdd538f7213d076

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers identified this PDF as malicious, likely phishing or a trojan downloader. No scripts were extracted, but the presence of numerous URLs suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9682

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://chcial.ru/uplcv?utm_term=greatest+common+factor+of+20+and+40 PDF link annotation
- http://twozonechickenlasvegas.com/uploads/files/29043497573.pdfIn PDF document text
- http://thicongdiennuocmiennam.com/uploads/files/74301606676.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/1c24750de214d37f22639b5190d508fe/nedanexibo.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/0b12b33b499081194a63c9ed07fee313/94414887892.pdfIn PDF document text
- http://bagiez.com/userfiles/file/8136070422.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091237a7077c---71611351970.pdfIn PDF document text
- http://vervesimuhub.com/userfiles/file/rudotidodurifo.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/05f7b573b41a91249f9643f07184862b/pumezopaxiruferikitarux.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49194dc957---wemedoxakozexobewunikarux.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a290e0ab524---98181614212.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab191ee078---pitutigovika.pdfIn PDF document text
- http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/jinodagovirilazijijexetig.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0769504cef---kuwapevekenitima.pdfIn PDF document text
- http://thebrownbag.vn/upload/files/bedudorepimatemonapujeg.pdfIn PDF document text
- https://creteservices.com/FCKeditor/userimages/file/8618994445.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607192f3c27d5---19557505515.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/541758af9b5eac7f0cb47561119fa3c8/kanitaseparit.pdfIn PDF document text
- https://ruiguoex.com/upfile/files/2021/06/16/nanozuw.pdfIn PDF document text
- http://csc0898.com/userfiles/file/20210703212747_tphmnl.pdfIn PDF document text
- http://sacoorhealth.pt/site/upload/file/55276896564.pdfIn PDF document text
- http://sportgalaktik.sk/userfiles/file/dawuvaxuxogolijakeno.pdfIn PDF document text
- http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/rgj8n68ur8f1i1qkabvcn7gkr7/simoleroreduxusuniz.pdfIn PDF document text
- http://tcihk.com/userfiles/roraro.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077ca1faa57f---86024722244.pdfIn PDF document text
- http://zatoodesign.com/userfiles/files/musomasotumikadivopije.pdfIn PDF document text
- http://dynamic1984.com/user_file/file/89054786586.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012cd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CD6	2640 bytes
SHA-256: `7cf5e381cd3e347f7ebbe440b63fcfb248ab18f789b7055ec012db775b253341`
`font_01_sfnt_off00013837.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13837	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001504e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1504E	10856 bytes
SHA-256: `a456eeafc28ab5c59d3d1313dba1820ba7c963b826a940c5736fd69a0556f571`
`font_03_sfnt_off00016983.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16983	17256 bytes
SHA-256: `7dae7ed5760b25a6a7a365d42feaa9b141b66093a267b07ff7a27e6c7ae0de8e`

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