PDF malware analysis — malicious · 03034e8ff18904a0

MALICIOUS

PDF

75.7 KB Created: 2021-09-04 11:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 4cd796b0f8611d5e570582b34a14c2fa SHA-1: cfb3091a3105472f98e4f1d619d2db8823ad8ec0 SHA-256: 03034e8ff18904a0eb0ecbe3eafb5fb9e3f595a40cad4f6822b6382fc6de4118

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and other potentially disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern involves directing users to external, compromised resources, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://iburgisidimarsala.eu/userfiles/files/37718123532.pdf In PDF document text
- https://nhanloc.net/userfiles/file/fekatazulimexetatuwabix.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16080f70b81f57---kogexonanerapijaj.pdfIn PDF document text
- https://go2germany.ru/files/file/nivijowulixitujijevid.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160750f798c344---9325260244.pdfIn PDF document text
- http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613237cc3da40---nekatotukuxamum.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072caf10df64---sokimenaxidafowufunof.pdfIn PDF document text
- https://arnetbilgisayar.com/upload/ckfinder/files/69044901029.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b200e0f2979---76539444730.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa35862ed---2714030607.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44b89b912---zegupewad.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f959a1fa6---dabijewewafexudupalipig.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/b3069f7320a0c567d345909b11dd1f11/22914020247.pdfIn PDF document text
- https://chmelo.hu/sites/default/files/file/40611381217.pdfIn PDF document text
- http://stl-hk.net/userfiles/babuvenusujebirupupup.pdfIn PDF document text
- http://weifong.tw/fckimages/file/1354651850.pdfIn PDF document text
- http://biosafety.biz/ckfinder/userfiles/files/95501194477.pdfIn PDF document text
- http://amandatravel.com/userfiles/file/xekutixunusamiwoxaji.pdfIn PDF document text
- https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/zagovitawapebodufulesom.pdfIn PDF document text
- http://promador.pl/userfiles/file/53375424081.pdfIn PDF document text
- https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/f41cc37b2519e5d26ab12006a70361f8/lunusiluvewagazovisibazep.pdfIn PDF document text
- https://firsatoyun.com/calisma2/files/uploads/32228531968.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbad04de15a---dokukerepulabe.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/7ba8237fd17dde3cd25a807285290b35/vowekibopige.pdfIn PDF document text
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d242505458---naroli.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=festo+pneumatic+fittings+catalogue+pdfPDF 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_off0000c688.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC688	10940 bytes
SHA-256: `0c28cc1e27befbe78acea84d09da5d3eecb3f8b19eac5a9d99abf8ef783822b6`
`font_01_sfnt_off0000dfa6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFA6	16116 bytes
SHA-256: `355401912ea7904b40d7e752f695c345f3944b82a8c36990201db4e076ebd605`
`font_02_sfnt_off000108e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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