MALICIOUS
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 a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that likely lead to malicious websites or further payloads. The presence of multiple compromised CMS upload links suggests a tactic to host malicious content on seemingly legitimate but compromised infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9952
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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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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://philabc.ru/uplcv?utm_term=what+books+should+i+read+to+my+baby
- http://helderlive.nl/ckfinder/userfiles/files/fujofibediwezadugu.pdf
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/amlgnd91096s9iq938rj6pf223/lawasetowunozuribavati.pdf
- https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd777d6363---wukubofozotupowanijadi.pdf
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46b78f8d7---manuravixefenibekorede.pdf
- https://iohrp.org/f_files/files/53179361492.pdf
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec2e985b08---fatopufutidogagak.pdf
- http://dabaizhongxue.com/upload_fck/file/2021-6-16/20210616123111810974.pdf
- http://tourister.kr/userfiles/file/96882375036.pdf
- https://designclarf.it/file/41734910202.pdf
- https://cfacgroup.com/uploads/FCK_files/file/burafabajupejikamo.pdf
- http://tensoinox.com/userfiles/files/mufemasezudu.pdf
- http://ingegnasrl.com/userfiles/files/68635648828.pdf
- https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/e70456d39b90ad00a17988f3263ef2e5/sutovudikukolepuvemikukoz.pdf
- http://aajude.pt/backoffice/ckfinder/userfiles/files/79623027508.pdf
- http://fertilityupdates.com/userfiles/files/67309199310.pdf
- https://intellicapital.in/ckfinder/userfiles/files/kikivekesedexobofiv.pdf
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/cb74201be85e56e536170b734c453855/62043865151.pdf
- http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/imcp03e8e3m543rvg32s14btaf/32045749908.pdf
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefa4d1f42---votew.pdf
- http://ymmicro.com/files/files/sirotijewagelorujarijubev.pdf
- http://newgrids.com/userfiles/file/manilorineselirurikujux.pdf
- https://bharatbiodiesel.com/userfiles/file/45799939265.pdf
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2gbcl8ugbt3l8fmtoiv6qlm0i1/9474655570.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_off0000f00a.bind948f160b27cbd1234435e29aa28ee7e4cc7dfc08229de4d2e08ddae735685eb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF00A | 16840 bytes |
font_01_sfnt_off00011b3e.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B3E | 16792 bytes |
font_02_sfnt_off00013355.bina418ba5287ae30b7f28a4c6e6194618bf630c9d25b452f5ca154882904e75dfb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13355 | 10848 bytes |
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