PDF malware analysis — malicious · 35144aa1586cea44

MALICIOUS

PDF

79.2 KB Created: 2021-09-15 23:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: eb5c790a5beba9cb4a48d75085696ca7 SHA-1: 7c0775c41f9f38abc271081d304c9d42b14d54ca SHA-256: 35144aa1586cea444e1976d22784d4fdd8a93afa3da3954cdcb3ebcf8dae2cc6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file 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 and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=cut+the+rope+no+ads PDF link annotation
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/221af55fd5af499b39ab465bc96854de/97914733528.pdfIn PDF document text
- http://concilianavarra.com/userfiles/files/37172740486.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b06324c2bf---minoronod.pdfIn PDF document text
- http://salonorganica.ru/upload/files/31830652161.pdfIn PDF document text
- https://novinfasteners.com/userfiles/file/62005703714.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614144058c2c7---rigumuzobilamit.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd7b5c3712---sapilunibazuwidagakol.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6a070aa1b---74268887992.pdfIn PDF document text
- http://njxinbell.com/upload/files/45691894634.pdfIn PDF document text
- https://wigs4less.net/nbloom/fckuploads/file/34172959940.pdfIn PDF document text
- http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/84407698276.pdfIn PDF document text
- http://metabolizmusonline.hu/images/upload/file/96011990554.pdfIn PDF document text
- https://dolmalatrek.com/userfiles/file/turiboni.pdfIn PDF document text
- http://devison-matras.com/upload/file/37735114578.pdfIn PDF document text
- https://sim2007.com/files/11942023412.pdfIn PDF document text
- http://venkateshservices.com/uploads/fewagafidagemovinixaxunuj.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b244c818d3---67899524699.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_off0000d12c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD12C	10484 bytes
SHA-256: `bb0a5e56944c5518c6ee67a68ceec30f403f932c7be6929954850a879fff692e`
`font_01_sfnt_off0000e8f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8F8	18152 bytes
SHA-256: `7ccbea500c57e939664012c35867c09802c90eae63aecc32988c881fb27d3c30`
`font_02_sfnt_off0001181d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1181D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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