PDF malware analysis — malicious · 8abcdcdad65f9e74

MALICIOUS

PDF

80.3 KB Created: 2021-06-26 03:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 8e9ac427e246d5f3bc9af272a0743d21 SHA-1: 198d5558b56c318333aa76c25d4f064489f29261 SHA-256: 8abcdcdad65f9e749a6095cef9b04fc8530ca30a7b27b5a3d9ce3fde0ce47141

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple websites, many of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further payloads by disguising them as legitimate files like PDF text editors. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/b3e367b3cbfcc459c3803b761f83ee35/majifegude.pdf In PDF document text
- http://youngshiny.com/userfiles/file/1622319513.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928dec23153---54983290973.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607638c2d1412---18237683917.pdfIn PDF document text
- https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/f39196e821a741330790f8f944cb6923/luvenululokedosuwepavote.pdfIn PDF document text
- http://biancoacolori.it/userfiles/files/95563359474.pdfIn PDF document text
- http://akinmedical.com/uploads/file/50376136741.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d8a0474b3---zolawejolekigazivesibe.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a082795f2e---waxozaxako.pdfIn PDF document text
- http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/cf6e3b9e9eae1e82767351dba9dfce07/dimifawumuxuferowezivov.pdfIn PDF document text
- http://dafangtour.com/fckeditor/userimages/file/26378803572.pdfIn PDF document text
- http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2c75741a3---36380659911.pdfIn PDF document text
- http://emmanuelmissionarybaptist.com/clients/74938/File/dagasuxajitaxijilipasotog.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607722c1c9503---tajomul.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/52pipfs3j6fgp4l3f0caso31o0/42047764694.pdfIn PDF document text
- http://mobydick-band.de/fckdata/file/banuj.pdfIn PDF document text
- https://vildmarksjagt.dk/userfiles/file/dugibigosarosadu.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/3gte66f30halg8nl07psjtaq10/20512192134.pdfIn PDF document text
- http://viprealestatebrokers.com/userfiles/files/20223528363.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa4e270c8---wipim.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/v72l9vglfncocu8ouiqimnnsl2/mowenixigeturibepu.pdfIn PDF document text
- http://msamerica.net/clients/873634/File/9088929189.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607121e74fbf7---vufogiw.pdfIn PDF document text
- https://ocw.tw/uploads/files/nimuwokalutorakadaponuxub.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=pdf+text+editor+free+download+full+versionPDF 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_off0000d561.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD561	10704 bytes
SHA-256: `bebba4f8d4d1056fa8ff3ee0845e69db11858ba26996caccab91d6fb354361cc`
`font_01_sfnt_off0000ee28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE28	16736 bytes
SHA-256: `d75b404e7471a932ee6240bf0a1366b974e1a66587bd4ff85fc0a3b05b3f5ebe`
`font_02_sfnt_off000119e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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