PDF malware analysis — malicious · 14870412129e07b6

MALICIOUS

PDF

105.2 KB Created: 2021-07-06 01:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 6c78c95cd2a655794ea8e2dbb1424082 SHA-1: d97603dbc4865a5b48cf268040be0544e3fc0c48 SHA-256: 14870412129e07b664489a2cdb54d3da402542b1d6c1f1a11aef421bc64f6fee

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://stacjaregeneracja.pl/userfiles/file/2933685533.pdf In PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/o5fdh6n3gusqtk6jt6ag1n09mu/bukipogevuxevisibaxidol.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094781cf1958---widikog.pdfIn PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098694302d5c---2996135610.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b0f87ee5d009fc41740aec77c3a2a73/sarofuvote.pdfIn PDF document text
- http://dobrejaja.com/Upload/file/45641899708.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c860119adea---mogif.pdfIn PDF document text
- https://e-uchebnici.com/img/file/wiraxulegoko.pdfIn PDF document text
- https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/9152ff724ba9c33a2b93558a6a2650a7/7016456011.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd16f1aa7---gufuxaxajejapazow.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/b0c7erk305h6k7k2c7siuj98bp/41894333318.pdfIn PDF document text
- http://eakqshop.com/ckfinder/images_store/files/welozavifokikik.pdfIn PDF document text
- http://finproekt-msk.ru/userfiles/file/69342264481.pdfIn PDF document text
- https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/66ff2528b218e3ce99a65a1741e3df69/sugagibaruvizoligusodul.pdfIn PDF document text
- http://bhk-aindling.com/userfiles/files/66572843540.pdfIn PDF document text
- http://italiangreyhound.pl/img1/userfiles/file/rumafofavokam.pdfIn PDF document text
- http://penzionriverside.cz/files/file/41927294463.pdfIn PDF document text
- http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa212b458f3---68934451268.pdfIn PDF document text
- https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/8c8794bae41c1de592478b3e77439c48/sebusin.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160748a0e98ea4---rilovolimutu.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b41aa3556a68ad84f0324f10d3847405/ridota.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090a4f2ba1c3---60857867148.pdfIn PDF document text
- https://talaa-obour.com/webmisr/uploadwebmisr/file/90385965600.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160848325f1914---luvakavuju.pdfIn PDF document text
- https://mosconi.net/userfiles/file/fuzixok.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=persuade+meaning+in+tagalogPDF 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_off0001370a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1370A	10692 bytes
SHA-256: `d08215b7c19b4ffcbab667b984bc98f584ae7ac23118d1dc7e4f9618e4ac17e2`
`font_01_sfnt_off00014f58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14F58	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001676a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1676A	18860 bytes
SHA-256: `659f82a7725b1d1768abdbab480fc9f86c412ebe77151ae7d09da6348eae791b`

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