PDF malware analysis — malicious · ebd34e75fc55e5ce

MALICIOUS

PDF

83.5 KB Created: 2021-07-21 04:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: ec68be02d11d48ed3f2afd1a71b33f61 SHA-1: 9e1a82b8a85bc2153446c8d085d300bba15873fa SHA-256: ebd34e75fc55e5ce66e119873966d77174891dd43d57f7b845c8f2b1d78d5390

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains an exploit. The presence of numerous links pointing to compromised CMS upload directories and link farms suggests an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an exploitation attempt, possibly leveraging embedded JavaScript or a known PDF vulnerability.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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 http://www.europesolidaire.eu/userfiles/files/vagosewadapemur.pdf In PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/g8a9p09vv1knblg9426k2s8ej6/zavupeda.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/83ffb0525d5adb12ef3efefd62bbb6df/56998391491.pdfIn PDF document text
- https://ilexgold.com/app/webroot/files/userfiles/files/47042569867.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e3307914---67991325429.pdfIn PDF document text
- http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/nozevamizejugojevurowil.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095229ca3ce0---81359635420.pdfIn PDF document text
- http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/7142676465.pdfIn PDF document text
- http://tw-sincere.com/upfiles/editor/files/jibogufosodefumun.pdfIn PDF document text
- http://digemnd.com/UserFiles/file/jibatidafabixesinune.pdfIn PDF document text
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0d0d30b0b4---gukafube.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdbc4a69ca---64855324157.pdfIn PDF document text
- http://aromaonly1.com/yamituki-n/uploads/files/rikisikukelusim.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eefb78675---54970373559.pdfIn PDF document text
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8d4fe92d8---9872627779.pdfIn PDF document text
- https://zlato-eu.cz/upload/files/88912633949.pdfIn PDF document text
- https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/2332eaef51c1a14f43fc263f75ccba5a/taname.pdfIn PDF document text
- https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2af0e92b5---84061407553.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/rodejujanufigutuwezo.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a89617ced---66236059593.pdfIn PDF document text
- http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab17ca8d44---merakuduxemakidanegabuxa.pdfIn PDF document text
- https://bem-sa.com/img/file/vogofatakaladomufexek.pdfIn PDF document text
- https://chrmglobal.com/userfiles/file/12710925625.pdfIn PDF document text
- http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/86631273063.pdfIn PDF document text
- https://goez3.com/10005001208290177/ckfinder/userfiles/files/damafabupakosate.pdfIn PDF document text
- https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/69851071415.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=present+perfect+continuous+reading+passagePDF link annotation
- 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_off0000e309.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE309	17072 bytes
SHA-256: `d2fc5951acdd4d5a44de6d9194bd8936f9e2dfc68d19c6bcb8301fbda6638305`
`font_01_sfnt_off00010f6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F6B	10848 bytes
SHA-256: `5e3dd94c1313b862fc78387219c10af325fde1dd3e13bfc4321cd29b23cf8e4e`
`font_02_sfnt_off00012865.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12865	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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