PDF malware analysis — malicious · c062e80a9b39e60b

MALICIOUS

PDF

89.4 KB Created: 2021-07-13 12:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 2484f435a99e687f3376a3dc8c2e652d SHA-1: 2e7c5e03254062f38febac0ff1e914c6d73d405b SHA-256: c062e80a9b39e60b3ce10470ce7117532a5fd99da2041ba666513d6b7ebe84dc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection or payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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://queure.ru/uplcv?utm_term=bootstrap+dashboard+theme+free PDF link annotation
- http://kadh.kr/bobod/upload/file/38930901592.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/7q7r3melvtnideprmlmht4fl71/55617810896.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/1e293eee8d9507147688de2469e23a49/80260632409.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2c6ea877ca2a657005a1b26c2640cc29/12589078809.pdfIn PDF document text
- https://linhngapt.vn/upload/files/35648701182.pdfIn PDF document text
- http://etre-belle.su/images/file/29801427337.pdfIn PDF document text
- https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/6024e6bff5366aae87ae99dfdd82fef0/selekopanowujudekojum.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d56673d180bb34439c83928a5c248b3b/ropevaretifofupuzoxetog.pdfIn PDF document text
- http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075d8de99310---14730777042.pdfIn PDF document text
- http://teechart.com/uploads/images/files/42910532035.pdfIn PDF document text
- https://murten-hotels.ch/userfiles/files/ginujuxabifonosiximavude.pdfIn PDF document text
- http://tano-cable.com/d/files/tituwak.pdfIn PDF document text
- https://afra24.com/basefile/afra24/files/22412802278.pdfIn PDF document text
- http://atomleasing.ru/media/File/xovepolasafuxalakisibuta.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d74184eb5b3ea9c52b2edc3af6577f3b/zesafetu.pdfIn PDF document text
- http://mini-garden.ru/userfiles/file/23865673179.pdfIn PDF document text
- http://abbwingslynnhaven.com/uploads/files/65097676196.pdfIn PDF document text
- https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/d8dbcb0ffb24d5fa70eeaaf97437c7c8/kixepuxezubijerak.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ccfb5fa16---dasanoritizalemutimiruka.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3157e95410---84634373283.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094d5ac32d9f---18269095411.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074caf3ecda9---12091041284.pdfIn PDF document text
- https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/0aaec5a76cedf7cb81cba4dbe8346f6f/53184413112.pdfIn PDF document text
- http://littlepearlbooks.in/data/eimages/file/16002681361.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160836d67458b9---46951523208.pdfIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e647.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE647	2256 bytes
SHA-256: `5f3b393c6c42dde8eed757013776962a05d625cc3882a5ad25a0c6475c86b905`
`font_01_sfnt_off0000f050.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF050	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010867.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10867	10712 bytes
SHA-256: `2d2532977643785141dfa0960501a4022dd311441cc2bf5097f29797f03656ab`
`font_03_sfnt_off000120d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120D7	21860 bytes
SHA-256: `c6c1c820b2966fe744d2cc199d6a3c92f530947add4c04ed86cb7f97adb9906a`

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