PDF malware analysis — malicious · e159d74ead807673

MALICIOUS

PDF

90.0 KB Created: 2021-07-01 20:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: c176a792288cfa6cecf315b1974014e2 SHA-1: 710bf8976ba0420623431d2cc93bf78b1aebcef1 SHA-256: e159d74ead807673bc63054f64b8e8bd4f0dc344c00681eb994e88c464bef987

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute phishing or malware. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://archism.ru/uplcv?utm_term=moral+excellence+meaning PDF link annotation
- https://angkoronetour.com/userfiles/file/78725144099.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e85ab8d7dd---71897131862.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffb42032ae---50694996721.pdfIn PDF document text
- http://sva-jeanroze.com/xmedia/file/dezozima.pdfIn PDF document text
- https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/kaas3jlpl3km2neh3dj6lcta4v/gejaxabufedutaxudoxujawej.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c779d6e070---ninifigozofijogisu.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075db07c0a41---rifanefajazorukig.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e981b07460---xitenomofawixodad.pdfIn PDF document text
- https://orrizon.ru/images/file/nezezuguwaloxam.pdfIn PDF document text
- http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/ziroj.pdfIn PDF document text
- http://resetimpianti.it/reset/public/file/15259349500.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d7ae01d119748dab5e06abcbe7e40ac7/22959894541.pdfIn PDF document text
- http://ritadas.in/userfiles/file/penutexavorir.pdfIn PDF document text
- https://kaptenhoki.info/contents//files/47956540305.pdfIn PDF document text
- http://personnelstrategies.net/userfiles/file/68577486957.pdfIn PDF document text
- https://alianzatours.com/imagenes/file/7258119992.pdfIn PDF document text
- https://aznamaste.com/ckfinder/userfiles/files/3878962059.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/96cc870cfa78905b7b9a67eb48207c18/fewufos.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82d13393a---buzejimabepetisub.pdfIn PDF document text
- https://circolodelpistone.ch/userfiles/file/62139187969.pdfIn PDF document text
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/3233c3e1dd678b33242e2678113889fa/4800610250.pdfIn PDF document text
- https://dimensioninteractive.com/WYSIWYGImage/file/wogirag.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2716e6abb9---duwuxojisom.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_off0000fcf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCF0	17160 bytes
SHA-256: `cf3aa33c8ad64e729cf913cf3841fbc1c59c3b12f6849f5280182ea4a3688c01`
`font_01_sfnt_off000129bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129BB	10404 bytes
SHA-256: `76d7a6766b9bbe22f6246b1f67072b2109d48435e99973f7faa08d005f18a4e3`
`font_02_sfnt_off0001413d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1413D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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