PDF malware analysis — malicious · d694ef82665e8077

MALICIOUS

PDF

82.4 KB Created: 2021-08-08 05:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2fc2d9f687af5b7dbabd75be84fd918b SHA-1: 67c277c3c3d6bc882a1b6c0cf756c338e29c7f4a SHA-256: d694ef82665e8077fe5254f77a32e1121a87d70494706d6b32c2df5554a054ab

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host or redirect to malicious payloads. The presence of numerous distinct hosts and the use of 'utm_term' parameters suggest a phishing or spam campaign aimed at driving traffic to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://oniceh.ru/uplcv?utm_term=jolee%27s+easy+image+transfer+paper+instructions PDF link annotation
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081257d7103c---54673764388.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160dcde73d1475---kalexogexa.pdfIn PDF document text
- http://poetische-malerei.de/web/editor/files/74473316149.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70f16cbb79---41887243148.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d122ed617e---52020244502.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3aeadf8e3d58db4781101ca6eb765995/68233212223.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fea22e2b2f5---pidufejumek.pdfIn PDF document text
- https://media-get.ru/userfiles/files/41286349271.pdfIn PDF document text
- https://proia.bg/userfiles/file/15226851396.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c0317e32---zadavewojasi.pdfIn PDF document text
- http://npas.ru/pic/file/28631893726.pdfIn PDF document text
- http://hoteldarim.ir/basefile/hoteldarimir/files/30622850663.pdfIn PDF document text
- http://riverside-plaza.com/upload/userfile/files/midenexowozodudivab.pdfIn PDF document text
- http://www.skk.com.hk/admin/ckfinder/userfiles/files/vifelikipotukaxosawono.pdfIn PDF document text
- https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/f0ab488dd7bfbe5b5d2d9cebf63315fb/wejazimidujogesoku.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609005035d492---gegavawid.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/dloai33rv0dpo041aqkpgq10e3/80913371261.pdfIn PDF document text
- https://33mobility.net/uploads/files/5034923572.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/hnnm7bc7tkge698pa459014615/77627435977.pdfIn PDF document text
- https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/78ac9d1f8c64413b7e113c054a3b89a6/titegenarijowopenibu.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910f52a3701---xisorefekuvitotapoguto.pdfIn PDF document text
- http://hk-sai.com/ckfinder/userfiles/files/70934738531.pdfIn PDF document text
- https://martensmgt.com/business_school/uploads/file/43926013787.pdfIn PDF document text
- http://mobilesamara.com/img/files/file/paluxikalodomuwabija.pdfIn PDF document text
- https://budgetparking.ca/admin/uploads/file/labunopagufedivapupigod.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecb840b2b5---2910906372.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_off0000dc76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC76	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f488.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF488	17232 bytes
SHA-256: `e04b882ca487e5d4f780dfd63a89526dbdf741598714937e54b11e46e7960f8f`
`font_02_sfnt_off00012158.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12158	11064 bytes
SHA-256: `ba1cbf4518d1adf94866fc8cdf7bcf4d2bd6076d9e9c7ad8e92f0e107e3e0e4a`

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