Malicious PDF — malware analysis report

Static analysis result for SHA-256 5426f8365a27e7b2…

MALICIOUS

PDF

84.4 KB Created: 2021-07-17 08:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a8c403d93c614a775b3c3e3479fffa3 SHA-1: d8bb3db8429d91a1b3c611754ed57b731964e4d2 SHA-256: 5426f8365a27e7b2da3a07ad891ed74a4ce307d3d9733b09d649af4e4c5c970e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The presence of ML and ClamAV detections, along with the nature of the URLs, strongly suggests a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f9db3c003---putisijid.pdf In PDF document text
    • https://geya99.com/ckfinder/userfiles/files/sogapuliviwa.pdfIn PDF document text
    • https://grnca.org/img/files/files/zegisejave.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5635f3cba---84158509864.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/15595dc54a4dcfdbe474fa20ddfd4153/pixex.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/8254322855.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/1780785841.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/29894467205.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/xatep.pdfIn PDF document text
    • http://brlairport.com/images/file/fidiv.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/wijetabelolotomorutupoze.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/23477964027.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/p9cjdgjh65qlj7ih1ple8qjqmp/81135197473.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3dba7d15d---numiwokapexunupugibod.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a34e999d29c---91593143552.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/46107913049.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48cdf67c22---87179115850.pdfIn PDF document text
    • https://coluer.ir/documents/file/laferonorumised.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a196c174ab6---toropotazef.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/90680871471.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/tuvona.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/29103209475.pdfIn PDF document text
    • http://hncastlecable.com/d/files/gagojalunep.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fb1735ed7---60725478620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=physics+and+maths+chemistryPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/17265719972.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91D 16728 bytes
SHA-256: b3194bf93baa55a36afecf0a48f922edb2874ff3bc3d2aa539da8e264536ccd3
font_01_sfnt_off00011479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C90 10584 bytes
SHA-256: 39bd48c6664124cfb11d9c6195695fa0c9d91c149e30c11c6a1dc1cf9122ea41