PDF malware analysis — malicious · a7fee343870f28be

MALICIOUS

PDF

90.8 KB Created: 2021-08-12 03:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 7ec5b84421710f70a648997c1b612986 SHA-1: c13131db35ec67ab02ad847b41b74e473c2b2792 SHA-256: a7fee343870f28be630b19c35673541319729acd0876ff9a3edae1b0f2af33aa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The presence of multiple links on potentially disposable hosting and the use of UTM parameters further support a malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://aonetreks.com/uploads/file/5198234376.pdf In PDF document text
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8d6291bf95---domosilulilo.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090f733f124c---44216933469.pdfIn PDF document text
- http://hysansam.com/fckeditor/userfiles/image/75515742163.pdfIn PDF document text
- http://pomodorolennep.de/gfx/userfiles/files/4262012503.pdfIn PDF document text
- http://travelshops.pl/userfiles/file/lulugupolulixen.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075167737ae5---wupobanevoxumareb.pdfIn PDF document text
- http://tc-antey.ru/uploads/files/xotopo.pdfIn PDF document text
- https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebf6cad135---55349834191.pdfIn PDF document text
- http://verduciautodemolizioni.it/userfiles/file/13328895345.pdfIn PDF document text
- https://soosekszer.hu/upload/files/samiruxarejusoxupeg.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/4f0b59cf70d74ed8890f8a62047dada5/2641173829.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8c6e43d08---jegimixuguvosozel.pdfIn PDF document text
- http://guinyardfamilyreunion.com/clients/62985/File/migafugopexidisi.pdfIn PDF document text
- http://airconbank.com/upload/fckeditor/file/mesonufarojijofepela.pdfIn PDF document text
- https://suksesunited.com/contents//files/mowolitoxagupusufedimewel.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610118558941b---kulejiw.pdfIn PDF document text
- http://dailycan.com/userfiles/files/molawoxasodobugaketa.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094453b9e82b---32602122580.pdfIn PDF document text
- http://a-b-i-s.net/layout/bilder/file/82362372861.pdfIn PDF document text
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/b4uvcjbr0k5kdqoerp1564i742/47004759376.pdfIn PDF document text
- https://delphin-restaurant.com/ckfinder/upload/files/ranupotazerenu.pdfIn PDF document text
- https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/2centvi8osg804f9g4kmgtojt6/86341517457.pdfIn PDF document text
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/42ac4e7002b1a0b4c429946136265a93/30916494540.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=samsung+galaxy+tab+a+8+inch+32gb+reviewPDF 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_off0000fbd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBD3	17420 bytes
SHA-256: `336a19c7aafecd57319c9756c0b1129cb21b2acf69b659f3504f1c64d5744e14`
`font_01_sfnt_off00012910.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12910	11740 bytes
SHA-256: `0dddd251070c34067cd7464f6a4e25169630114025fc42688a594a3c8923a678`
`font_02_sfnt_off00014507.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14507	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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