PDF malware analysis — malicious · 44915cb7629a9ad2

MALICIOUS

PDF

87.3 KB Created: 2021-06-29 17:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: a99f5a570956c812cc9aed385eb34bb0 SHA-1: d27d04e14b64305fa76915d050848eb05c3be8b4 SHA-256: 44915cb7629a9ad2c0343c721277813d951fb7bb5787fd54158bb0184a0066f6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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 http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c651660eb5---85304724212.pdf In PDF document text
- http://luberoff.com/userfiles/file/33732133689.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c794dd4b4a---40456286283.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079c1df47028---7941852798.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/ussmb07jbiuqipat833t3p80e1/9551908004.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/xivinanizularogitigu.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ad9b1eeed---5283340156.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/j56lusrechktl8f2d29j3miidq/xokeda.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160719f414dc68---56641888765.pdfIn PDF document text
- http://aircond.md/upload_fck/file/lurumopemilevatapelalox.pdfIn PDF document text
- http://libertyquad72.fr/userfiles/file/wefavev.pdfIn PDF document text
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/5057cb6107f40aebeef4b93a5312c32f/benubigedaborazodenulatid.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a283ecb6acd---97081843165.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce705d61698---wufaz.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e3c2a0e5---40129153431.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/42eadcf95df09cc3267f84d5b4626a2c/70347044008.pdfIn PDF document text
- https://iringmalaysia.com/ckfinder/userfiles/files/mowogitapumebedase.pdfIn PDF document text
- http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/vagare.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea434d07f---zodokulenugamuji.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/22169709370.pdfIn PDF document text
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/2ba7e14bc3112590e9009ffc29a7a566/wudutuwafuwujuxekodavira.pdfIn PDF document text
- http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lelusirexalugitoje.pdfIn PDF document text
- http://technoculture.cz/admin/upload/file/35001160714.pdfIn PDF document text
- http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210621_FFDDBAAAD93255DF.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c3755780d27---88189704227.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=signs+of+extrapulmonary+tbPDF 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_off0000efe1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFE1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000107f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107F8	11232 bytes
SHA-256: `18b1fd72ed58c75b0089ffd23a5e84adcbaafcad5cf8af527fba0cd56b3efc77`
`font_02_sfnt_off00012219.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12219	17664 bytes
SHA-256: `bdb561c003e1d2b5c6c94fed7411fee27d63690bac308ac50897fb0947d31534`

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