MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic and numerous embedded URLs pointing to potentially compromised websites. The document's content, though heavily obfuscated in the provided excerpt, likely aims to deceive users into contacting a malicious actor under the guise of resolving a billing or subscription issue. The presence of multiple links to disposable hosting and compromised CMS uploads further supports a malicious intent, likely to redirect users to phishing pages or download further malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://queure.ru/uplcv?utm_term=how+to+turn+off+voicemail+on+doro+phone
- https://channeloflove.com/ckfinder/userfiles/files/bisetolofuguwibijori.pdf
- http://niezapominajkowo.eu/userfiles/file/xaxizafimerowi.pdf
- http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/ribagowanobakop.pdf
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610304beeafbb---bezurejavikifonid.pdf
- http://amsaneeraus.fi/userfiles/files/10918540480.pdf
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/156db1b6e1bb49329a5ebf8262b45688/77772098689.pdf
- http://easyliveconstruction.com/ci/userfiles/files/90433310265.pdf
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/6df5b6fa37384d0735cbd260d09fdd1f/69284842804.pdf
- http://tfforming.ru/d/files/zafis.pdf
- http://daedukgs.com/admin/fckeditor/data/file/20210615030101.pdf
- http://bafiti.com/sklep/userfiles/file/muxulevajuxavuluputu.pdf
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608569c8d8bf2---86882043046.pdf
- http://sportsclinicwest.ie/media/contents/file/xuzis.pdf
- http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079005ca3291---kefomegafip.pdf
- https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0ad2da174f92396e8af2c6601ea225a/75090088532.pdf
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/93205b1c2462a0cb6f5a010fc02d8725/90724919009.pdf
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bfadc8b21---runezapitepozuxo.pdf
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160751e5d7b53d---rabixemin.pdf
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f917c9d38e---liduzofiduf.pdf
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/0d7d9eb8b90cbff3708e9db3f89a4dc2/mekosasewejeguf.pdf
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd692082762---31731371132.pdf
- http://gfhs1978reunion.com/clients/56625/File/53129529988.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000bc6c.binfbb98d9d9b3c896c7c0386a871a84a76f2d773025d9339c108cd0678c4678888 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBC6C | 10960 bytes |
font_01_sfnt_off0000d5a3.bin552fb18e3dccfa6b74fd167cb115d28dac8123793f83bfe4e5f8896cf432d059 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD5A3 | 16100 bytes |
font_02_sfnt_off0000ff58.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF58 | 16792 bytes |
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