PDF malware analysis — malicious · 767c3d37d83e3861

MALICIOUS

PDF

78.0 KB Created: 2021-09-01 16:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 78b2472946c411894e99cb6ff7f74ed9 SHA-1: d1fad7c3f5aeb95f4b843de910c4aa6a1c8a1c11 SHA-256: 767c3d37d83e3861f7eebbea1fc4b349bc8ce0dec57cc2ed45b0342cb80cb2bd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=contentment+is+a+great+gain PDF link annotation
- http://fitviewer.info/files/file/bojilavi.pdfIn PDF document text
- https://bdaudit.ro/userfiles/file/23911271781.pdfIn PDF document text
- https://macauroommate.com/ckfinder/userfiles/files/74609591929.pdfIn PDF document text
- http://abwbaltimore.com/uploads/files/18113027038.pdfIn PDF document text
- https://altonika.pro/files/fck/file/23496798258.pdfIn PDF document text
- https://peptidturkiye.com/ckfinder/userfiles/files/62070151141.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/17210934611.pdfIn PDF document text
- http://breakevenpoint.pl/uploads/editor/file/jenobaletemebogu.pdfIn PDF document text
- https://eltechma.com/zdjecia/fck/file/papozuwudazigizuzoz.pdfIn PDF document text
- https://questyme.com/userfiles/file/gidudo.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/a60c705f37498a1313fa9edcd16235b2/lofixomemidogowetiboxova.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a202fb1c22f---36103975897.pdfIn PDF document text
- http://0-50.ru/userfiles/file/bafosuvarugasotokofuvovo.pdfIn PDF document text
- http://candemdientu.com/Images_upload/files/6929070769.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf60d0da74---70941929382.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a12b56062c8---surotekazu.pdfIn PDF document text
- https://mytalk7.com/_UploadFile/Images/file/lesitubisiwikikow.pdfIn PDF document text
- http://vertinu.lt/ckfinder/userfiles/files/7539553920.pdfIn PDF document text
- http://inarchengineering.it/userfiles/files/perijikegokeminepefob.pdfIn PDF document text
- http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/korizi.pdfIn PDF document text
- http://jshtextile.com/UserFiles/file///sunaxunemijatejasi.pdfIn PDF document text
- http://ldksolar-officialliquidation.com/userfiles/files/14223772759.pdfIn PDF document text
- http://activesolutionelectric.com/images/file/3946840810.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_off0000cc95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC95	18000 bytes
SHA-256: `fe70b304e1e649569054656d1ca3ea78e33b2dcecbdfd24f581906aad20532fc`
`font_01_sfnt_off0000fb06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB06	10436 bytes
SHA-256: `602166416a4083e5c64c6fa55192e57b902f943c47aceeadba19961abc142243`
`font_02_sfnt_off000112bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112BD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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