PDF malware analysis — malicious · 3c0718c2f49a5d73

MALICIOUS

PDF

87.7 KB Created: 2021-09-13 09:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: a15b32336a568da942cfd5c2e0d8f8d7 SHA-1: ab8aebefcd9867b6a7d37dd7016c90bbb937a51b SHA-256: 3c0718c2f49a5d73d0907d35a41c09af89c421de88ce7459d4b2d0ff323bc0bf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate the presence of a link farm utilizing compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. No scripts were extracted, but the overall structure points to a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613953b5791e4---58293676903.pdf In PDF document text
- https://www.rougeindigo.com/ckfinder/userfiles/files/74538568329.pdfIn PDF document text
- http://proficlim.ru/public/userfiles/file/pudogavufiporatizifofefed.pdfIn PDF document text
- http://fratellilongoni.com/userfiles/files/wakalumogo.pdfIn PDF document text
- http://embeddedhr.com/ckfinder/userfiles/files/zuxaxawubojotenovuji.pdfIn PDF document text
- http://wsmr.us/userfiles/file/19374333734.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/rafakamowinux.pdfIn PDF document text
- http://lltsg.com/uploadfile/file///2021090714490735.pdfIn PDF document text
- http://ideviceplus.nl/app/webroot/files/userfiles/files/71929723975.pdfIn PDF document text
- http://mptech.vn/ckfinder/userfiles/files/14042076308.pdfIn PDF document text
- http://unternehmensberatung-hegenbarth.de/userfiles/file/zuzeloduremuvutewa.pdfIn PDF document text
- http://www.pics4us.de/userfiles/file/dijoruvanomarevew.pdfIn PDF document text
- https://legend-chang.com/UserFiles/files/47844173228.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/e11faf7f5ce3e8f51e9883facba9c6c0/32240828125.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4b54d8e46---70211962657.pdfIn PDF document text
- http://brandorbit.in/userfiles/file/lovokerosebiribadojowum.pdfIn PDF document text
- http://fongyoskert.hu/userfiles/files/dirunis.pdfIn PDF document text
- https://heritagecambodiatravel.com/userfiles/file/86964818338.pdfIn PDF document text
- http://baovethanglongmb.com/upload/files/totokagobavapulumezeza.pdfIn PDF document text
- https://eghamatsafar.ir/basefile/eghamatsafar/files/fejufuwozugozafa.pdfIn PDF document text
- https://castilloexterior.org/ckfinder/userfiles/files/46434228470.pdfIn PDF document text
- http://9262895.ru/ckfinder/userfiles/files/tujoxebobifofewelegumu.pdfIn PDF document text
- http://weldingplaza.com/files/file/28705440326.pdfIn PDF document text
- http://ranahytta.com/ckfinder/userfiles/files/46379609267.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=update+phone+emojisPDF 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_off0000f0f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0F5	10648 bytes
SHA-256: `8282cd0f550b91f03b2620b55f954e37c85484d2a1696ee252d207d9b6655644`
`font_01_sfnt_off00010919.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10919	18668 bytes
SHA-256: `41a41abca23cf3c922583cfd0f5dd4191ec6be2102d7a8ab7f724139428db942`
`font_02_sfnt_off000138e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138E5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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