PDF malware analysis — malicious · c4e8028c94a3265a

MALICIOUS

PDF

80.4 KB Created: 2021-09-02 06:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: ce08730ddfbabe42b848b7be1b7d2874 SHA-1: 9b6f28e3ce19f4ae82beb15a4482347bdffd4065 SHA-256: c4e8028c94a3265a21aec04c60b2f895cb5e5f5757d223db9846c153052ffeb7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external, potentially malicious, websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=animated+dubbed+movies+in+tamil PDF link annotation
- http://b-solutions.net/userfiles/file/biwetirujekixotokenize.pdfIn PDF document text
- https://ichibaninfotech.com/ckfinder/userfiles/files/lilage.pdfIn PDF document text
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739510cf0ae---10284566024.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820b069a556---xuxitezegifemovilexipo.pdfIn PDF document text
- http://aylincinarli.com/fckfiles/file/muwosenobesiwazuwoxulo.pdfIn PDF document text
- http://birons.net/wp-content/plugins/super-forms/uploads/php/files/303b7c7056899b874cef862a83b54d36/49009797332.pdfIn PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a0597bbd1---dibefopasatobiwepaviteri.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16104c795f0b53---55402364154.pdfIn PDF document text
- http://kingcraftviet.com/uploads/ckfinder/files/5840708073.pdfIn PDF document text
- http://motivationandmomentum.net/ci/userfiles/files/14815783785.pdfIn PDF document text
- https://www.agencesramos.com/ckfinder/userfiles/files/magekatow.pdfIn PDF document text
- https://mgogs.com/mgfiles/file/90142332029.pdfIn PDF document text
- https://pavillonwohlen.ch/userfiles/files/46282454972.pdfIn PDF document text
- https://clubsecurite.fr/webroot/upload/files/ketesexugimapuli.pdfIn PDF document text
- http://superplasticizer.cn/d/files/17328704740.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161228e0003931---6609749133.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e956cb4a1c---75759900894.pdfIn PDF document text
- http://innova-perila.ru/upload/files/rotuka.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cffaf26a9ec---2228624141.pdfIn PDF document text
- https://alarouba.com/ckfinder/userfiles/files/44691940493.pdfIn PDF document text
- http://brezov-gaj.si/uporabnik/file/wotanari.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9a3066c8---tadize.pdfIn PDF document text
- https://gamepinleri.com/calisma2/files/uploads/87982658595.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_off0000d786.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD786	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ef98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF98	17124 bytes
SHA-256: `f583f6cd07bd57bbe2f773b8b07763183461410a945763a514199eba40c0c318`
`font_02_sfnt_off00011bda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BDA	10596 bytes
SHA-256: `1370512e28b7dd93fd05bb651e46f88e9fbf198b91b10133bf4dc9d20be41611`

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