PDF malware analysis — malicious · 24b4dbca1eb96c97

MALICIOUS

PDF

91.4 KB Created: 2021-09-03 08:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 12015911991071268d7d9e85a7ca715a SHA-1: 3fa46f06ce28d8b9cc57a0d0b1ab44f91a581350 SHA-256: 24b4dbca1eb96c97b2d3e0de25e202276bded4f3b9d7c06c45308c0099062101

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV. It contains numerous external URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs indicate an attempt to direct users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=sufficiency+thinking+pdf PDF link annotation
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c665ef1be6---vixolujape.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/0cb92ea411800467407c77bde37ef594/56151386881.pdfIn PDF document text
- https://bloomlight.pl/_bloom/file/nuligaru.pdfIn PDF document text
- https://adsbudget.net/userfiles/file/nejigom.pdfIn PDF document text
- https://hizlipin.com/calisma2/files/uploads/11816368854.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa882b9167---kulesugawadatug.pdfIn PDF document text
- https://cualuoihoanmy.com/uploads/userfiles/file/pulijupul.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611830d6a5893---3070036794.pdfIn PDF document text
- http://brlairport.com/images/file/lurivugegivomulaxidotigi.pdfIn PDF document text
- http://whatcanidoforyou.eu/publish/file/87426134799.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f70bd6020---21637344313.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5873df115---petak.pdfIn PDF document text
- https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/603cfe38de29fad09f585ba5f9316bf5/8406186005.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/lorknm6alb5ohbkeoj8eti8aos/fisene.pdfIn PDF document text
- http://thienlongadv.com/upload/files/xinimugurenolagamosiwako.pdfIn PDF document text
- http://ytovietnam.net/ckfinder/userfiles/files/rotozujasibu.pdfIn PDF document text
- http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/puxeraxabe.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca1e061dac---tupobop.pdfIn PDF document text
- https://eletvital.hu/uploads/files/suxovujobenapudip.pdfIn PDF document text
- http://ya-ke.cn/admin/upload/xawapi.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/dd2303b221351acab76ad3101dd72a3d/vewonogig.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/008cb76cfbbf600d4e5185db3b3abefc/22683826377.pdfIn PDF document text
- https://lawina-radom.pl/files/file/78681224887.pdfIn PDF document text
- https://panificioilcavaliere.it/userfiles/files/wotelomojodarutaxifaf.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_off0000fef4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEF4	10684 bytes
SHA-256: `82e6d42096890e0aa4ca876b0b94fd0515b25227521626eaa9b5fcf2666095d3`
`font_01_sfnt_off0001173d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1173D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012f4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F4F	18496 bytes
SHA-256: `dee70755b2513f13d38fdee72f1f906a1a42d81063011284705c45752e3b3b88`

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