PDF malware analysis — malicious · 7597598c6c3cb54a

MALICIOUS

PDF

71.7 KB Created: 2021-09-06 23:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 348a9e032ceb0eb7caa1612786273e51 SHA-1: a9eee29dbdf821cd64ab065885bfb11d62ae9747 SHA-256: 7597598c6c3cb54abec974aba60daf04a6b524fd99431bec4dc92147508c74ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf73bd71bac---63430187096.pdf In PDF document text
- http://agilesolutions.in/uploads/pifolovotegagadaper.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e6b33bfb4---2009870880.pdfIn PDF document text
- http://ecohort.com/userfiles/files/11288766542.pdfIn PDF document text
- http://nuraski.pl/wsg/userfiles/64152453970.pdfIn PDF document text
- http://flightshop.jp/images/blog//file/zitoxafafedigexofime.pdfIn PDF document text
- https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/0nqgs42eo1rvp93mt8fqo938td/10297797465.pdfIn PDF document text
- http://goref.ru/files/file/6529576338.pdfIn PDF document text
- http://superazs.ru/images/news/file/88747973845.pdfIn PDF document text
- https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/834a6b4a37603257537180efeaafab42/42935401806.pdfIn PDF document text
- http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/72079832712.pdfIn PDF document text
- http://animationcoach.com/userfiles/file/81331053586.pdfIn PDF document text
- http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/rosozim.pdfIn PDF document text
- https://music-group-store.com/upload/files/50811942746.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834de38531e---37087910820.pdfIn PDF document text
- https://landbondcorten.com/attachment/file/2ae26d91a5111ee783a17b8bd5cae9c5.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e17171f73f---64283363077.pdfIn PDF document text
- https://aldapa.eus/files/galeria/files/16241476267.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca1a21123e---70060071998.pdfIn PDF document text
- http://nature-revive.org/files/file/manegijipelutat.pdfIn PDF document text
- https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/dbfe1b9403c86f5a75af0f1a5039095c/pigemob.pdfIn PDF document text
- https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/75413469332.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/sozozizoji.pdfIn PDF document text
- http://acecaalcoy.com/userfiles/file/vemov.pdfIn PDF document text
- http://gasthaus-steinkirchen.de/img/editor/file/35237090702.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=govt+polytechnic+college+list+in+up+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_off0000b3bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3BF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cbd1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBD1	16916 bytes
SHA-256: `2418f3489fdd83c57417b2d68c07cc6bce0adaaac02e050279a66a3534b1f3b6`
`font_02_sfnt_off0000f7cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7CD	10956 bytes
SHA-256: `42a1f9d2bbfbd9fb5624abdd182a54686db784f01e1541b5116ee067bc93f166`

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