PDF malware analysis — malicious · 38f1bb7dcc246dcb

MALICIOUS

PDF

72.7 KB Created: 2021-07-30 07:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ba7d88dca9d9bbdfe71825f479606ce0 SHA-1: 5859716f24002ce4265d5186c3c32cc43b91866f SHA-256: 38f1bb7dcc246dcb9265e2efd68638d2feda266a31efb54a3fe21196e10e6fcf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to lure users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=the+leadership+experience+6th+edition+pdf+free+download PDF link annotation
- http://divorcefinance.nl/uploads//file/3477415046.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7770b2f5f8---97554457157.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/7jjnhj4u1lq9vjg9kn8tam6ujv/marakivi.pdfIn PDF document text
- https://gmt-tw.com/app/webroot/userfiles/files/9060427729.pdfIn PDF document text
- https://ktmcollege.org/public_html/userfiles/file/wawozapu.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160dafa7a39b70---33858133928.pdfIn PDF document text
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/rspnj2flkf2n4vterht8m87k36/15865752635.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/8f5c5c1d5f9accad07e93b957ae6fb9b/60793975014.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/0h94ppe66qt0o0c0msjj1vt255/11809093518.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa3a6af90b---97884724248.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d8b7cfcbc3d4b0ed1714ed42f22bb6e5/24558593105.pdfIn PDF document text
- http://www.insight-assessment.com/ckfinder/userfiles/files/zebapidasuvabamelas.pdfIn PDF document text
- http://postelezmasivu-brno.com/ckfinder/userfiles/files/vufogefaxozem.pdfIn PDF document text
- http://bkmarine.net/ckfinder/userfiles/files/1625183127.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609461e04d583---18612644687.pdfIn PDF document text
- https://tecnicadovolante.com/images/file/lusekuvukexiliwejonuf.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/9nd0uhga5fl2m3hvl3fihg3cpd/salefepowobofoxagosaju.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0a5659a0e---jomukakevini.pdfIn PDF document text
- http://php-lounge.de/userfiles/file/24931419654.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99ac24ef9e---xulojufuvu.pdfIn PDF document text
- https://hazeloyun.com/calisma2/files/uploads/76008346750.pdfIn PDF document text
- http://sanitaerprofi.ch/fckeditor/editor/images/file/guwawebadetovawez.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/9pplh3u5qe8voon83hpcmci2bf/gofusagewibamavo.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d27e8361bff16fcd9a28ec11bcada901/29572251717.pdfIn PDF document text
- https://bit.ly/2WUpS20In PDF document text
- 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_off0000bb13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBB13	15752 bytes
SHA-256: `0bbc891af00a4909d2a288e8aea707b79b94ca6cbb582746ba9a7d28e39deb6d`
`font_01_sfnt_off0000e369.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE369	11036 bytes
SHA-256: `c90953f065c0e2c90a2ef3e80cb1825dcb048b2993a7ae039412a172eadc0d54`
`font_02_sfnt_off0000fd1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD1D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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