PDF malware analysis — malicious · 776196699d21ee27

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 18:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: fbdc94bd1575a81c95973dc3ec095f9b SHA-1: ea481157558247c30ecfd1591a25b4d47b00a0e9 SHA-256: 776196699d21ee27f06f80e32afba6b6ddb7c2073d3f646d24adcbb551afce75

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of numerous embedded URLs indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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 http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9jotmo5vqmm281bf8jg6albbp5/tixuwebuzopaladu.pdf In PDF document text
- https://zhbiotech.com/CKEdit/upload/files/83641165675.pdfIn PDF document text
- http://charivne.info/images/file/48803759844.pdfIn PDF document text
- https://equator-maritime.com/userfiles/file/lupizilipolupalekoke.pdfIn PDF document text
- https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9cdc0bbcbc68ff2f0a2cca4e25dbfb5d/40518296357.pdfIn PDF document text
- https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/9a41577a66470f662ccfe96168d950ce/73988753883.pdfIn PDF document text
- http://iseveranscopy.com/upload/editor/file/7031009993.pdfIn PDF document text
- http://maivietnamesecotati.com/uploads/files/99036281602.pdfIn PDF document text
- http://domainecomps.com/documents/files/61564763122.pdfIn PDF document text
- http://etoprosto.ru/ckfinder/userfiles/files/vawilajizifoxijidotuxoroj.pdfIn PDF document text
- http://wingmanresearch.com/userfiles/files/19211690766.pdfIn PDF document text
- http://kme-kme.cz/files/file/13704897851.pdfIn PDF document text
- https://hirurgija.me//files/bilenazulumexiludibolu.pdfIn PDF document text
- https://aiwatopup.com/ckfinder/userfiles/files/gimudiwemo.pdfIn PDF document text
- https://eetravel.net/file/36099006680.pdfIn PDF document text
- https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a15b5d980---jukexukan.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c166a75432---61199877822.pdfIn PDF document text
- http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/61526756094.pdfIn PDF document text
- https://tanthueviet.vn/img_data/files/fadowisemijubifu.pdfIn PDF document text
- http://www.alfapilates.pl/upload/file/xufojarotajadezegiwowe.pdfIn PDF document text
- http://studiodebiaggi.eu/userfiles/files/46132611534.pdfIn PDF document text
- http://asianaccounting.com/admin/fckeditor/userfiles/file/3441775049.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d81f4e2f0f5---juzisogupan.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceacb7940f---21841187252.pdfIn PDF document text
- http://inruho.ru/ckfinder/userfiles/files/15328232713.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/ponamiraso.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=vision+board+template+free+onlinePDF link annotation
- 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_off0000e465.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE465	10768 bytes
SHA-256: `7f39d6620ef7897ad250e8f71db6ae2d91685d1db1502e0be8a96b6929318120`
`font_01_sfnt_off0000fcf9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCF9	17916 bytes
SHA-256: `ffaaaf97ce4ba5ebace9031d9edafdae2e9f1386c539c645fcaef2602f78bad8`
`font_02_sfnt_off00012ace.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ACE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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