Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f601c0e1f545d4f…

MALICIOUS

PDF

83.4 KB Created: 2021-10-13 06:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 163357096bedfedc9685b61dee27b612 SHA-1: 98c9c80414a6fff0f1478fbcc5eddf7ebef59c3c SHA-256: 1f601c0e1f545d4f4e105fe08cdc2a0988366cc0bf8f6e218a2081d9c67b3eb0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and potentially phishing-related. It contains embedded JavaScript, indicating an attempt to execute code within the PDF viewer. The document also functions as a link farm, directing users to numerous external URLs, some hosted on compromised WordPress sites, which is a common tactic for distributing malware or conducting phishing attacks. The presence of embedded JavaScript suggests it may download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crmsaas.dswip.com/ci/userfiles/files/rawewinawame.pdf In PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e06e633ba4---84180076588.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/diwakopukovorisilitesizof.pdfIn PDF document text
    • http://oiacreation.be/userfiles/file/9296780467.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/ligesiputeze.pdfIn PDF document text
    • https://egca.fr/userfiles/file/juwojuxafizalofobusudusot.pdfIn PDF document text
    • https://sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16155e038ae564---52477720442.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ka0u2ejosq3qbajouhtgf15ta0/refodipivibat.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/bukuvolevaka.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/rapunaxidalegukakakipome.pdfIn PDF document text
    • https://cape-electronics.com/media/file/pisimufuna.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1631783999JzmF.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/11183589448.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/uiu2dtujkvsplrgqh5e73dkp7d/89210322413.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/14526702968.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/56992029696.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/jujerevoradojijuzefa.pdfIn PDF document text
    • https://click2repair.chocoza.com/userfiles/file/kerimoluvakoverotululir.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134eb3476244---vezegimebavuxi.pdfIn PDF document text
    • http://vaynhe.com/upload/files/zezepiro.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/punonoxijedawe.pdfIn PDF document text
    • http://origo.ws/userfiles/file/60121657819.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/mamolefivanexowa.pdfIn PDF document text
    • http://oris-am.com/editor_up/86795323135.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/21950941435.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/u-9XGpgKpwY/uplcv?utm_term=production+process+in+business+plan+examplePDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 17348 bytes
SHA-256: 11614a8ba89ec93ab37462cb3905c5b5db49ab141ea4b67b27a9443bc0d807a2
font_01_sfnt_off00010df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 11016 bytes
SHA-256: 152bb03e99bb44093db0fd8d6194ae18866b78b4615cce825535f91129dd475d
font_02_sfnt_off00012759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12759 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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