PDF malware analysis — malicious · 71e2ec3b44b91cc4

MALICIOUS

PDF

86.0 KB Created: 2021-07-20 03:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 95eb5a420455b5f6ab21ce8dfafac4c8 SHA-1: f4bc0b9a935a2698aa980301d529926f59588315 SHA-256: 71e2ec3b44b91cc4f5007d678c95f890bd75d7cb80318f60f6c9ba7f655c9688

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for phishing or malware distribution. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The presence of embedded URLs and the overall structure point towards a phishing or malware delivery attempt, likely distributed via email as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://motacademy.it/file/28909562032.pdf In PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9df72ade3---wuterobibimavefew.pdfIn PDF document text
- https://fulzugaskozpont.hu/files/lejen.pdfIn PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7158008d---45953760305.pdfIn PDF document text
- https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/6ffb56c47153858bfd6d4234f3bf8aca/pumizevidelirisa.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16074fc15f3944---jiratofixidakigol.pdfIn PDF document text
- https://confidence-ist.com/ckfinder/userfiles/files/vuwadorizojer.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/9f7b42c4d4499571da45b4c794495e6b/rofolobutexenosinovi.pdfIn PDF document text
- http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1377445880---89308489148.pdfIn PDF document text
- https://nikosdimos.gr/userfiles/file/17350812296.pdfIn PDF document text
- http://miskolciharsona.hu/pictures/file/fazexarulefag.pdfIn PDF document text
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/6599677664c386ff726b93c08b27d220/xexixavav.pdfIn PDF document text
- http://wagnerpc.com/userfiles/files/razulikalizovoveroxamovek.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160863c3ceaeb9---vagigi.pdfIn PDF document text
- https://turbooto.vn/upload/files/80135951729.pdfIn PDF document text
- http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/zemamirudagomeda.pdfIn PDF document text
- https://autoprofi.ua/userfiles/file/buderaw.pdfIn PDF document text
- http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3828b09e0---jajusowiko.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/5216ca14c040e12b92b67c479882ec7d/wujet.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d7f3a9217789f582a7a4876acd36926a/ligariteduximimu.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/8d90adb5d1ebcec7b695a15301f7da41/nuvoxekafi.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160782264a4d5b---57666144431.pdfIn PDF document text
- http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/gekevododemijalaliw.pdfIn PDF document text
- http://dighakanchaninternational.com/FCKeditor/file/49792992332.pdfIn PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087a7b1783e9---68816869785.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=word+template+for+user+manualPDF 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_off0000ebba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBBA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000103d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103D1	10660 bytes
SHA-256: `97b742ac5e56b64273fb1db1311323be0e3ba04b9db70ecca9b794a8b399bd16`
`font_02_sfnt_off00011c3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C3E	18160 bytes
SHA-256: `26aa328f09988ac8704b316a17404336f2f0cacc82aa22cafa6c4001df4cbc46`

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