PDF malware analysis — malicious · 7fc75d916c8f6616

MALICIOUS

PDF

90.2 KB Created: 2021-07-16 00:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: dcedfe63cf2a65a2d606c689ae9abe2b SHA-1: 5de35dcfc102c1afde7ee9ec4bc1cef51a07abd1 SHA-256: 7fc75d916c8f66166dbe7f140e8ce1d1410adc79fc626221716f090a15f07892

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to further malicious content or downloads. The presence of multiple distinct hosts and a link farm structure reinforces this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a84a345079e---60933665.pdf In PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba146300261---7852534240.pdfIn PDF document text
- https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093060b5a9b8---tupexirefudakurateloju.pdfIn PDF document text
- http://lws-realestate.com/userfiles/files/92354620691.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/93107bb1896791bc5a215aec50a2d931/38621117028.pdfIn PDF document text
- https://btcauction.vn/hinhanh/file/85437226800.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/njqjb1hc66di790aa9icgs48t3/sotal.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec6578045c---rulujasinijobimemub.pdfIn PDF document text
- https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b628cc2936---1013470145.pdfIn PDF document text
- http://chronicles.ae/userfiles/files/vinipikolomabetowupoj.pdfIn PDF document text
- http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/75366374347.pdfIn PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cb37bdc94b2---87367260629.pdfIn PDF document text
- http://inwallendorf.de/userfiles/file/42523527389.pdfIn PDF document text
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b08e1aa78b7---21796234881.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/04b9de1b49ad6b9412b0f61909d7fa38/zijebidolejarol.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bae8464cb5f---sivom.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qhtkojavpmc2qoo284j30hs8e7/zapijukimogutuxafirezom.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083568be3352---siwatarupivader.pdfIn PDF document text
- http://khanaphatgroup.com/UserFiles/file/sajekuso.pdfIn PDF document text
- https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/712defd67cce71c221b2cab16aa34989/7801209858.pdfIn PDF document text
- https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/adf3d017dce4fc8c844b944a6dd49518/37524256493.pdfIn PDF document text
- http://radissonhoteltraining.com/userfiles/file/kifijoxew.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/l11gg1o26ai5n2uikoqaidn000/vugimutekisovevawu.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb631eca04---kefutofazuxemikokut.pdfIn PDF document text
- https://kawanmto.info/contents//files/repavabifijaf.pdfIn PDF document text
- https://omegaplus.bg/uploads/pages/files/21666334306.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b038d8431---90229448893.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=painful+chest+coughPDF 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_off0000fe83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE83	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011695.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11695	16588 bytes
SHA-256: `48eaab0bd0972273fd8c1131207cccc93215342cd0c44c964e858f123b9b097d`
`font_02_sfnt_off000141e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141E6	10616 bytes
SHA-256: `8ead4f428cee19b3dfa6a6799a4041368827c6ef374e52efa4986a720b76719e`

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