PDF malware analysis — malicious · 3d8656132d3cd05d

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 17:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 996bb703bd86f8b12a9270b3006f53e4 SHA-1: 5035ceead84a28a17dcb6827d85a434a87a9227c SHA-256: 3d8656132d3cd05dcde4bc19e86866b6f5e43ebc0302a5c5c845b6c97fc85e25

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://pixomot.ru/uplcv?utm_term=how+to+say+7+in+spanish PDF link annotation
- https://contabil-fiscal.ro/mm/file/kitexodasulozeterela.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b8d3bb74a---92053583561.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/862979b72ab0f8622c9ec647168cb18d/mawijenisaviduzat.pdfIn PDF document text
- http://ndt-tl.ru/upload/file/nifimuridelavuxetewa.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/94611002669.pdfIn PDF document text
- https://lolakarimova.uz/ckfinder/userfiles/files/kejulagebonoteveterar.pdfIn PDF document text
- https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/72c2933d86bb3d4ca3d7cebc09eac399/pizoras.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/di1rl3047q3sq15hq78526alde/zamozakowuzuniboxabe.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1ba803c4b---mawogu.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/8928d142b8b4e8c6030c53f66a51334d/gibitikexesisot.pdfIn PDF document text
- http://fenotropil.ru/userfiles/file/64030996974.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/42e48f5f2864891c22928f855e23267a/vuwaxezimukapazaw.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cf38f92c497---lokunir.pdfIn PDF document text
- http://stevis.cz/files/file/jutorof.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd46acefd29---labonosefasafena.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/5d3ecd5eebbe41bea831309318637b01/xotupesoreronanex.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0953b4819---27321906189.pdfIn PDF document text
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/183d9bb2e69ea62263ab5dd8f13813e4/75229904906.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607966824daa0---35609684347.pdfIn PDF document text
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160739434d193e---ruwirerexaf.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834e75a98ff---ravepepinusosatufifaf.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086bf142b3ad---wodunifaribugumili.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/57898a1b9bd970a711df128f7ee52b86/tisilakezojitesulebib.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084500ca9658---17567790639.pdfIn PDF document text
- http://abc-tel.ru/data/File/walovedovojiruxuxewatizi.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_off0000f54a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF54A	10312 bytes
SHA-256: `c4dda5f179755a2f3cc79fd6189eeb03da54c07d30e82dd17401b0a683e5931a`
`font_01_sfnt_off00010c8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C8B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001249d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1249D	18672 bytes
SHA-256: `1a28b5370d913f0deb75723386cdfafaa1b7c4cc9e7dc9a48c73198ce74c983d`

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