Malicious PDF — malware analysis report

Static analysis result for SHA-256 414e6baeabd6682e…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 20:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78d4f8522d91a7df7be1112c05bc627d SHA-1: d1edd53761939fe6c23d88e632f173a19ded55c3 SHA-256: 414e6baeabd6682e8abeda687d0a049ef56a68dd6c27552e0f862dacbf02b216
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to PDF files hosted on potentially compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest the document is part of a link farm or phishing campaign. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=how+do+i+save+something+as+a+pdf
    • http://botosani.ro/img/uploads/file/bijakutedikumawikar.pdf
    • https://buka.ru/sadm_files/vozowopinawevizivoju.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142c0898f24f---75598232750.pdf
    • http://195exim.com/datas/files/ziwesinipunor.pdf
    • https://octvads.site/js/ckfinder/userfiles/files/midufejikivaxidanevoloda.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8e1eaf4bf3a938dd599b2fe0d37f58fc/rovusuburej.pdf
    • http://abwrva.com/uploads/files/bukenerikagodijijojapak.pdf
    • https://tomaszbizon.pl/web/uploads/files/40955452715.pdf
    • https://gogreenonline.net/userfiles/image/fckeditor/file/jokezijezubujavezogawot.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6180ad0b2---48506757627.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea48426480---tuwatizani.pdf
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/latepalejinabefumib.pdf
    • http://longbeach.ilovepokebar.com/uploads/files/wapunezixuvapakujuga.pdf
    • http://engineersclasses4competition.com/files/others/99686586851.pdf
    • http://web5gstore.com/Files/files/wiledutivusabuvadiralevir.pdf
    • http://fortwashington.abwingsmd.com/uploads/files/23297497000.pdf
    • https://rafautama.com/uploads/file/32617490643.pdf
    • https://grnca.org/img/files/files/sezawulerisusap.pdf
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/bavukixokivena.pdf
    • https://securitydm.rs/slicice/file/72492893074.pdf
    • http://risorsaterra.it/userfiles/files/69360835554.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16141c53918572---99542532198.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c6a424295---48654642704.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df27.bin
eb30d479cae63c48e928bb8e6b364a611a9e6c77a2409ff76a9c829fce07c3cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 10944 bytes
font_01_sfnt_off0000f82e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 16792 bytes
font_02_sfnt_off00011040.bin
b5419c3984b921448797d736e4c7004b2a111aef1194f2cf72611ae293c8c3bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 17040 bytes