PDF malware analysis — malicious · d893fab7360deedb

MALICIOUS

PDF

85.8 KB Created: 2021-09-14 02:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: a6fc1c48da962473c76320382960c382 SHA-1: 82cdde705e2f392af3635e62ce13118226c986f7 SHA-256: d893fab7360deedb46463a8beb4723edebfb8d1f45a7ffe84b175749227f7a31

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content, though obfuscated, are consistent with malware delivery mechanisms.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=manggahan+pasig+postal+code PDF link annotation
- http://aokunoil.com/ckfinder/userfiles/files/potatagokavigupemikape.pdfIn PDF document text
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9450cb231---jewezebox.pdfIn PDF document text
- http://chornakorn-packing.com/ckfinder/userfiles/files/barunisuro.pdfIn PDF document text
- https://5of7edwardstreet.com/assets/media/files/zabojinilepozuf.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/bcd0e4d273c3e9d164570ecc4d4d314e/62903599619.pdfIn PDF document text
- https://tivirtual.com/userfiles/file/27484366125.pdfIn PDF document text
- https://fiberglasssupplydepot.com/userfiles/files/rorixebuvimurugusixixag.pdfIn PDF document text
- https://ferado.vn/userfiles/file/41405522513.pdfIn PDF document text
- https://www.ijestr.com/ckfinder/userfiles/files/kisizerur.pdfIn PDF document text
- http://sxhk365.com/uploads/file///31879325949.pdfIn PDF document text
- http://vitali-schulz-eiskunstlaufen.de/userfiles/files/46441751325.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f49a3f9a7---80415551786.pdfIn PDF document text
- http://mayjack.com/upload/files/lufutigupemowivubakaver.pdfIn PDF document text
- http://ruizhishengwu.com/uploadfiles/file/08071414806.pdfIn PDF document text
- https://livbiopharma.com/userfiles/file/14649626510.pdfIn PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d8da73506---labudewi.pdfIn PDF document text
- http://liveranigioielli.it/userfiles/files/47687963042.pdfIn PDF document text
- https://datatalk.ilvzhou.com/upload/files/2021/09/202109081515283108.pdfIn PDF document text
- http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/8fspr72bc97h579h0rchlne7v4/ributilujofusugef.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613413c6c777e.pdfIn PDF document text
- https://pmrmhss.com/userfiles/file/99426524800.pdfIn PDF document text
- http://www.donboscovizag.org/images/files/92825289336.pdfIn PDF document text
- https://ptogel2.com/contents/files/bapejugiwekutalevawam.pdfIn PDF document text
- http://nb-magnet.com/upload/files/bilonemuzobaz.pdfIn PDF document text
- http://acrclubinversores.com/files/galeria/files/2343725616.pdfIn PDF document text
- 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_off0000e25d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE25D	10688 bytes
SHA-256: `d4fff3795e49b632e55b87def609c41a777c44562bbee9a491f457333d08054a`
`font_01_sfnt_off0000fa9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA9A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000112ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112AC	21004 bytes
SHA-256: `bd3629b987b4663e851c896198ff8896f8a205c410ad3be4ef437b073fb9faf0`

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