PDF malware analysis — malicious · a30cef490d224e2c

MALICIOUS

PDF

88.9 KB Created: 2021-07-08 05:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 5f28f1bbc6267dae6a6c20bdc40eb661 SHA-1: 455d66fe9143b1ef6db4e0ad7266427031617055 SHA-256: a30cef490d224e2c1f0fd432bb8da792d4d80ea34be20e6af65a540ea9c3de74

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links likely serve as a lure to redirect users to malicious content or phishing sites, consistent with a phishing attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

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://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/63as5qnumca4utokfu12dctvk4/2954773703.pdf In PDF document text
- http://nedirajtebosnu.net/userfiles/file/xezorebuberabenuloruvul.pdfIn PDF document text
- https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/690dfa3e990c5e70b78347750bab1e74/sodemomilivamun.pdfIn PDF document text
- https://hondamienbac.vn/userfiles/file/77475534752.pdfIn PDF document text
- http://technestudio.eu/userfiles/files/risuvemotegog.pdfIn PDF document text
- https://csn-alliance.com/data/files/34582501310.pdfIn PDF document text
- http://progfin.pl/userfiles/file/44905223606.pdfIn PDF document text
- http://naucseto.cz/storage/pefixitogujadibinutize.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160824d24509a3---17336463627.pdfIn PDF document text
- http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/81510795266.pdfIn PDF document text
- http://www.anieliasfx.com/uploads/textareas/file/13512079562.pdfIn PDF document text
- http://guides2alpes.fr/uploads/file/3830686869.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160821b713d343---54182172372.pdfIn PDF document text
- https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/p1hbdochs305cktq3rqnjgvl4c/57578428637.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080305eaffd5---83561984554.pdfIn PDF document text
- https://noihoithanhtuan.com/media/ftp/file/suzenosuwukug.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d891e6fb---gafoduganizumi.pdfIn PDF document text
- https://dgssu.com/upfolder/e/files/20210701184651.pdfIn PDF document text
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16091feb715fe8---lipejane.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/bd20e6342283c2814ff4354591c13c2a/93207336437.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3677732ee2---87740790896.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/beb6045ddd30859db777e0f74f535312/saxadazezovafetij.pdfIn PDF document text
- http://aggengr.com/uploads/CMS/file/8069200184.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=minecraft+pe+lord+of+the+rings+modPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e19a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE19A	11060 bytes
SHA-256: `61649a64716d648ba674427da9ab7772e4c1c5d8a2416c2ae72a64177e27d88c`
`font_01_sfnt_off0000faed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAED	16980 bytes
SHA-256: `0d15b77fd72cd7d076a0f90f37fe8b605d4fa393d74d249920f09ad768c05ff0`
`font_02_sfnt_off0001270d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1270D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00013f1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F1E	16064 bytes
SHA-256: `a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16`

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