MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs that form a link farm, many pointing to disposable hosting or compromised CMS uploads, suggesting an attempt to distribute malware or conduct phishing. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. No scripts were extracted, but the overall structure and URL distribution point towards a malicious document designed to redirect users to harmful sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9953
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://crewmak.ru/uplcv?utm_term=android+built+in+sip+client
- http://mclarenquartz.in/ci/userfiles/files/59458882098.pdf
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ef3d6d9ead2af90f79a9c6fadbcba029/26039212390.pdf
- http://megalabsrl.it/userfiles/files/46108152175.pdf
- http://www.bluewhaleline.com/image/upload/File/ragukufirilenapemevuvaji.pdf
- http://nuovojob.com/userfiles/files/12818284049.pdf
- http://yonezawanet.jp/units/24250/zcycom/files/jafux.pdf
- http://gancza.pl/userfiles/file/terolodepiravi.pdf
- http://gayaarchi.com/userfiles/file/20210915154424.pdf
- http://sherwoodchambergolf.com/ckfinder/userfiles/files/ranobukajazozobefok.pdf
- http://neoneofytou.com/ckfinder/userfiles/files/kubefobasexuf.pdf
- https://mkart.it/uploads/file/tisukibesonutifepa.pdf
- http://doradcyprawni.com/images/pliki/2791088756.pdf
- http://xn--49s538bo8ux8c.net/userfiles/file/rogazawazipe.pdf
- http://saigondome.com/uploads/userfiles/file/67874610535.pdf
- http://radio-salsa.com/php/rs/filesupload/file/pafopiwagakivutapasoxo.pdf
- http://mamolenasnc.it/userfiles/files/kojukenexavor.pdf
- http://chronocertif.com/userfiles/file/zerenivakulejes.pdf
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e198822036---xepalofujuvepikebufudo.pdf
- http://gizmakina.com/depo/sayfaresim/file/53004942712.pdf
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161410ed04a476---20660401471.pdf
- http://moderncarrent.com/user_img/files/85815000632.pdf
- http://bfr-bialapodlaska.pl/userfiles/file/60335610743.pdf
- http://1day2night.com/UserFiles/file/31574516275.pdf
- http://denkobarbell.com/_upload/files/55442442109.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_off0000ce0c.binfa2d15bab2a57976a9537f6329bb266dfd8239c6264d6b4a0252044cd8e51f64 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCE0C | 17832 bytes |
font_01_sfnt_off0000fc11.bin7c9f45bf3eeee019baf7b19eac2ee83bd8758101061612560412c0f52e6b941b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC11 | 10568 bytes |
font_02_sfnt_off00011413.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11413 | 16792 bytes |
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