PDF malware analysis — malicious · 95e9578ff306d71e

MALICIOUS

PDF

83.7 KB Created: 2021-09-05 19:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 4934e5f3d49fc47dc07963e6b5f0448b SHA-1: 7616e78b9c5bc8495d550a9f1d93d7c49418145d SHA-256: 95e9578ff306d71e288bd175a85a09e6b6d23fcc12e5baf383347e633980ac9a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF format and the nature of the URLs suggest a phishing or malware distribution attempt.

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16121066499be8---zutokuwinipo.pdf In PDF document text
- https://aznamaste.com/ckfinder/userfiles/files/tafobuviwuvuju.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca3ddab4f---tegejodubes.pdfIn PDF document text
- http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ab9d52a0---92300937969.pdfIn PDF document text
- http://manajrgvaaradhi.com/cms-uploads/files/sapidamaremi.pdfIn PDF document text
- https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/22096408359.pdfIn PDF document text
- https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/d88a30222d4cb7b32297fefec676bd35/80472458986.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79a20d2d0a---posorisi.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076ba9e1218c---totezojodebezogupu.pdfIn PDF document text
- http://esoftland.com/userfiles/file/6652259628.pdfIn PDF document text
- http://seanmore.com/userData/board/file/99187060373.pdfIn PDF document text
- https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3e6846f8d2b67e80e0fe8e08c49067d7/37037266383.pdfIn PDF document text
- http://fecoil.com/userfiles/file/14209033995.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f4d58de2f6536d7cad3f3ddc0c57a0c2/2377736021.pdfIn PDF document text
- http://matsonconstruction.net/userfiles/file/komofezijan.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdfbbe54e2---vudidodebamizetupe.pdfIn PDF document text
- http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ae7cb73edf---48086153889.pdfIn PDF document text
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083840946d27---89399908925.pdfIn PDF document text
- https://pezenasenchantee.fr/userfiles/file/48441148707.pdfIn PDF document text
- https://highrise.pl/file/woxuvikozig.pdfIn PDF document text
- https://augsburger-dartliga.de/uploads/file/nalexu.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/bf5a4167367b42de48ef547f1f2601ea/29954445135.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/a886c014a45bde43ee22aeb9a6c73836/ronuruzinoxegogamerizelu.pdfIn PDF document text
- https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ead005ca8---45974349205.pdfIn PDF document text
- https://martensmgt.com/business_school/uploads/file/20043983726.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sociolinguistics+ronald+wardhaugh+pdfPDF 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_off0000dfc3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFC3	18224 bytes
SHA-256: `324befba174f13779a6f9ced3027e9d8c13587d58a285a7a2989760b035efdbc`
`font_01_sfnt_off00010f20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F20	11028 bytes
SHA-256: `cd620f12d4185c02b2bee68c642a5acdec9de55b0e91685d304b6174422a73f6`
`font_02_sfnt_off0001288b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1288B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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