PDF malware analysis — malicious · 907b3c01276b36f9

MALICIOUS

PDF

96.2 KB Created: 2021-09-03 13:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b078063d22dd8b60595f51d601065f73 SHA-1: e3b5e5e1451d6b6ea5467391908d1c0ed9846d60 SHA-256: 907b3c01276b36f934169bdc050b84cb1b1d069fe50542f8a4f14dda672bba5c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate it's part of a link farm designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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://nomylo.ru/uplcv?utm_term=grief+and+loss+understanding+the+journey+pdf PDF link annotation
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607171828b407---rikijodedutaxizunovitafa.pdfIn PDF document text
- http://rexant.by/upload/editor/files/ramadiwijaj.pdfIn PDF document text
- http://kolaykanal.com/userfiles/files/zapoxagap.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/2decade9883b6ff53292cc001ae69029/xagaworedajujigoruzowu.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/c5e665101a7344769b26b50bdc67f94a/67566061908.pdfIn PDF document text
- http://smartpaintingplus.com/userfiles/files/4406176429.pdfIn PDF document text
- https://jotekonybakterium.hu/userfiles/files/gatazezeguzekanigutozup.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c6cb234cb---60853599897.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/2107ue7cj3c171nmmurptnl09n/gudulawanun.pdfIn PDF document text
- https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/2d9rkibi65mus1bjp1p0kloe9e/21807567865.pdfIn PDF document text
- http://milwaukee.center/userfiles/file/parunedaj.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b05935690e2---75427578989.pdfIn PDF document text
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/f94d20d567d3b08a55339206354cff59/zujipagerufizapuruxigo.pdfIn PDF document text
- http://hodori247.com/uploads/files/7915439071.pdfIn PDF document text
- http://vuatoyen.com/uploads/userfiles/file/vilipuwinimejuma.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831134e4491---44151579540.pdfIn PDF document text
- http://gayaarchi.com/userfiles/file/20210605062426.pdfIn PDF document text
- http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/2da83b90671ff8cf565715f3b3fb92a4/27920255720.pdfIn PDF document text
- http://www.empresshasnoclothes.com/siteuploads/editorimg/file/6198505699.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/12119c589aa89a700c10b97754eaf7d3/selabedolub.pdfIn PDF document text
- http://studiosantese.eu/userfiles/files/bidotiwoponijigikavizo.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f153c3f256---19160204741.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d516c2a9bb4---84939742307.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/af38883495ca29393b049293a443b737/16963982303.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_off0001118f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1118F	18328 bytes
SHA-256: `f37dede5852471aa5762543ca7b5194b4c7ea4f92c2484a0ff20e5d819592a54`
`font_01_sfnt_off000140ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140EC	11160 bytes
SHA-256: `dc3854d8cd7b0782b3038f5500920c5aa5877bdc7f3812f8c267e0d53bf34bd2`
`font_02_sfnt_off00015abf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15ABF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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