PDF malware analysis — malicious · 6f9e15e3c310aebf

MALICIOUS

PDF

80.2 KB Created: 2021-07-16 00:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16

MD5: ef5255014d5d86a7cb5a685d46a25cc9 SHA-1: 8a6b5e50b7f0200d7a0696dcb96a9f49d6024f7b SHA-256: 6f9e15e3c310aebfcdcbdf07e7453a2c45c36f8c7212c6f5fd9f94468634106e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to malicious sites for phishing or malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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://archism.ru/uplcv?utm_term=need+for+speed+most+wanted+wii+iso PDF link annotation
- http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8d2d36de---voduwolinuvawovujodoti.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4l2g7m9o4023q1mjf0e12g8cp4/8846840603.pdfIn PDF document text
- http://geoodwierty.pl/files/file/genegemokexumud.pdfIn PDF document text
- http://hani-bee.com/userfiles/files/21482907988.pdfIn PDF document text
- http://universalgroupautos.com/files/others/rojemu.pdfIn PDF document text
- https://aduanaldelvalle.com/userfiles/file/44787743444.pdfIn PDF document text
- http://labonguyenhoang.com/img-chamthi/files/wojonek.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf157741cf---21677660746.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/qtsug83ijpg01uol5pn36a0t8g/noxalalevexutazemibenokaf.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/db867ff13b5e2e17efdbd32a8231041b/73625730673.pdfIn PDF document text
- https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/c2it76btl68urjof6dgi551ag3/5472435221.pdfIn PDF document text
- http://4seasonstours.in/userfiles/file/wubaxunojosiw.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8e1ad0ea---89641024444.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49799746f6---rulagevetumabevepodoko.pdfIn PDF document text
- http://yule-sign.com/upload/editor/file/20210625224344.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a7c71644b---tenitijutuberixet.pdfIn PDF document text
- https://bjjewels.net/nbloom/fckuploads/file/gaxitivafimijinesa.pdfIn PDF document text
- http://allasclub.com/campannas/file/xivifotasokabevakebij.pdfIn PDF document text
- https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/7808231b7a81732f04914657bc9b728b/dakufukebodiresezepola.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607adda80e912---5976396765.pdfIn PDF document text
- http://wabasnb.com/files/fckeditor/file/176913268660df0b0836194.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dca24eebbaf---9581328775.pdfIn PDF document text
- https://elitediesel.com.br/ckeditor/ckfinder/userfiles/files/51022983992.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_off0000d36b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD36B	17884 bytes
SHA-256: `ab8fdbd9c96527b948ee3f9bca9dfacd418cd3bd58ea329abc82e3791c2d327e`
`font_01_sfnt_off000102cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102CF	10676 bytes
SHA-256: `75752454dd14f2e767590320dee5a940039736269057057bdec83897094d2064`
`font_02_sfnt_off00011b5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B5C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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