PDF malware analysis — malicious · 6edd10109616ec1e

MALICIOUS

PDF

89.0 KB Created: 2021-07-06 21:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 1556979ce113c666611099cf0b05113c SHA-1: 3484b1777d125967b52e4909f7c8b8a8a6bbddff SHA-256: 6edd10109616ec1e86dfdc408659935766b59808469b60c361a94bf8652358b1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and the 'link farm' heuristic indicate a strong intent to redirect users to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/aab96de02d9b4f49d07478b63d3828e4/simagilu.pdf In PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084ae7539600---65008551668.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/80a542eab6559c394bb1c91870857537/pixex.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b135b6e6ad05cb92c48546c43a45eaf6/41216898626.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089cc6368a20---rutavubej.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865ab34608d---1916934159.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b42a5aea6128d38d1b099e1c49c560b5/wedaketate.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/e5imk0d1diurvuujssp1m7qrn6/74515515169.pdfIn PDF document text
- https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/b5989a3b16e21200c564ac83bcbca8ca/85442682552.pdfIn PDF document text
- https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/1a8b27b8ca36bd7a9ef02ea63f5cc83a/93548575737.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/ebc52111af0663f2c7386892d144c56d/rapif.pdfIn PDF document text
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bc6c149c6---25039179767.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160992043c2f18---69215874184.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160782b1bee0ac---naxunuri.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ba4058981b281cf0faf2308314a5b4b0/146601892.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/vo2cqhpc9lllh31s65s6uds5d5/zowuv.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077185327baa---toxoxik.pdfIn PDF document text
- http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rinerilidepomaluw.pdfIn PDF document text
- http://elazentrale.de/images/uploaded/file/84213745099.pdfIn PDF document text
- http://brandnewgoods.net/userfiles/file/fexatuwoneborubebuf.pdfIn PDF document text
- http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/q48tvqmq83hucqo10i8cjlkabh/41494798836.pdfIn PDF document text
- https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/92dc0f1bb08ca5a4e690d8eadc35cace/58698549402.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3bf38436b---wudatoj.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=bell+metal+is+an+alloy+of+copper+andPDF 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_off0000f4be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4BE	18492 bytes
SHA-256: `a338f740f425344c3d357b07446ea49f29facd5d18c26b1573e105c0f66fcad6`
`font_01_sfnt_off0001253b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1253B	10948 bytes
SHA-256: `b2539ae16fa9477761c9804f096116042f4c1ace20946b4d3e4a9d7a025a2708`
`font_02_sfnt_off00013ea3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EA3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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