PDF malware analysis — malicious · e4cd6a11dba175c9

MALICIOUS

PDF

82.2 KB Created: 2021-09-01 06:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2f519f670da7711483a9946d2b05b3c6 SHA-1: 254fd8cea55eae2406d4509935fd6bc02d946830 SHA-256: e4cd6a11dba175c9b7807f8e8a624fa0d588dda20074c1ed2ff8aec383ab04a2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous compromised websites, suggesting an attempt to redirect users to malicious content. The presence of many distinct hosts and disposable hosting indicators further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://lahma.pl/_u/userfiles/file/runabaluxejelazijema.pdf In PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16121b3f6498a2---78689593786.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/161299309c734c---ropodiselapifesisulimolaw.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/9b2270139aada38a60c2f67313508542/zatololegegos.pdfIn PDF document text
- https://machnhaduong.com/images/uploads/files/50178186541.pdfIn PDF document text
- https://shunnasato.com/43089350319.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/524639ba01aa30c71c0e07e9ad779f43/41243152300.pdfIn PDF document text
- http://ofitecnic.es/files.ofitecnic/fck_up/file/wamuso.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c78a9c17f95---53109810652.pdfIn PDF document text
- http://freehajjandumrah.com/admin/admin/uploadfiles/file/36919982407.pdfIn PDF document text
- https://masterjobintl.com/ckfinder/userfiles/files/62587341418.pdfIn PDF document text
- http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f0d1ae772---besizujimuwefazosar.pdfIn PDF document text
- http://meruzhankhachatryan.com/app/webroot/files/file/bexezijuruvoguxebaref.pdfIn PDF document text
- https://coffeetuanvang.com/Images_upload/files/gulukigijuj.pdfIn PDF document text
- http://taxicityplus.ru/userfiles/file/41830580979.pdfIn PDF document text
- http://aapltd.net/userfiles/file/fodim.pdfIn PDF document text
- http://tamker.hu/userfiles/file/84577919239.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/q8gbq23heamrosiu72a8a2sn12/wemufin.pdfIn PDF document text
- http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/vopobozotikuvanibo.pdfIn PDF document text
- http://scandirent-new.ru/uploads/assets/file/32515605622.pdfIn PDF document text
- http://baovethanglongmb.com/upload/files/845587745.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/9604b261f8dfa64d58a38f9d4d53d072/50704894869.pdfIn PDF document text
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/33f78538f952965f170f75500958096c/61160616331.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f519a5ba94---76637697937.pdfIn PDF document text
- http://speaklifeiamgreatness.com/files/files/xozufuwapadadidobile.pdfIn PDF document text
- http://fulepmark.hu/nyebu/fulepmark/userfiles/file/51449784741.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=hp+quality+center+overview+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_off0000ddad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDAD	10948 bytes
SHA-256: `85786be00cf96521734f8a6bfde7232f560e5c626ccaeffebc6cc3cb09c23503`
`font_01_sfnt_off0000f6ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6FF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010f11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F11	16952 bytes
SHA-256: `a5faeeaf707f1a7c2d9ae9555029289be7b29883eef56f921ca1b7068ec399a5`

Open this report in the interactive analyzer, or submit your own file for analysis.