PDF malware analysis — malicious · deba2c40709623df

MALICIOUS

PDF

83.6 KB Created: 2021-08-30 15:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 170aa0c97aa12930a2ca67eb455e2695 SHA-1: a1405150ea5191e27a0acd50b6e4e18ae816db49 SHA-256: deba2c40709623df6dcf6409484da00c85b9dbc2ecda6dbf329e4ddd7a7afe2c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of multiple external URIs and a link farm indicates a primary goal of redirecting users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://kvbm.org/pds/userfiles/files/pepug.pdf In PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d501cb9e5---pugevekodaje.pdfIn PDF document text
- https://doina.md/fckeditorfiles/file/duwetezimi.pdfIn PDF document text
- http://saimiri.name/upload/file/xidaw.pdfIn PDF document text
- https://speeddating.lt/speeddating/ckfinder/userfiles/files/44035593258.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1tumap5idd8l9etp6plgunh8el/63455730663.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f98687d98c1---64148566137.pdfIn PDF document text
- https://oklogistic.lv/upload/file/73513256902.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/53628816282.pdfIn PDF document text
- http://metisentry.net/ckfinder/userfiles/files/8439992971.pdfIn PDF document text
- http://www.emailposte.com/pictures/fovelakuxizafiko.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094423f02eb5---dokukovepajekalopaze.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708fb420179---60137479262.pdfIn PDF document text
- http://promocode.lu/userfiles/files/24403197451.pdfIn PDF document text
- http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/9121993057.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/afd50cc2e34feba63fa64f0e9605ad59/88476687322.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/thijs222vb5ncg74go1m63uac2/71277730017.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/1f0c47dd9b21e4d91cd7fe9e7a3729fc/25822286496.pdfIn PDF document text
- https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/4775onr3cdlc88fkk3cqqmnhs0/losada.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8eca47416---26022379227.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f4c84bb7b30e6bbac62a0962029860d/46435244304.pdfIn PDF document text
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715b339ca6e---48574238853.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a63e2659778dced72f9852a44057daf/nigivokolixinunemuziza.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1b97bf2140fb538bcf1629fd5849a137/xizejugapalaxiwunar.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=calculus+single+and+multivariablePDF 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_off0000e384.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE384	10932 bytes
SHA-256: `90573527992e46ce9d261aabfc6b52cdaa44525363e647d00cee2cff9c76ddb4`
`font_01_sfnt_off0000fca4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCA4	16996 bytes
SHA-256: `2c20da61951a3308eb16803e05457871300d9555b238f415bd09bff563234931`
`font_02_sfnt_off0001286d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1286D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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