Malicious PDF — malware analysis report

Static analysis result for SHA-256 425b4e2931df7a8a…

MALICIOUS

PDF

287.1 KB Created: 2022-02-23 23:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: da8d50f7b6a0337f1673bc1eb52ea5c6 SHA-1: 7c46da50eaaac2a89282495c4bbc67aa2e7cf6e1 SHA-256: 425b4e2931df7a8a41b82adff58a23ade02ac82e4f8ffc40988415c846d4c5a7
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external URLs, many of which are hosted on compromised websites. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates the document uses an image lure to redirect users to a free-download phishing page. The embedded JavaScript likely serves to further exploit the user or download additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9494

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://sunuf.co.za/XSRYdR1H?utm_term=calendar+2019+december+pdf PDF link annotation
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/69510896fd5e2a4c5e20db7d560d7221/wilinalufosifixebenaki.pdfIn PDF document text
    • https://ciar.vn/uploads/image/files/23094659801.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/rtf0efvedujm3gkesra3gnea0j/9214908666.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/resozerajezon.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/gixiguj.pdfIn PDF document text
    • http://mcelvain2020reunion.com/clients/b/b5/b5167212b805812c9439186484f80f5e/File/zowatugofisotebapefig.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/xorerevonituxesali.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fb39f0b60dc---36719581401.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/65635879961.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/zamini.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/85917608155.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/53206242706.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/laxovapofokaposel.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/14938023251.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/limesemikinokodeliguva.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/41058294363.pdfIn PDF document text
    • https://limsurdua.com/contents/files/54794673453.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/nolejunezuzi.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/79079253855.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_off00040f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40F43 17956 bytes
SHA-256: 08b59ff3bf3258f7c0efb68d9a099111f61f5e30939422fcb23f6fa68ef027ff
font_01_sfnt_off00043de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43DE2 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00045502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45502 10936 bytes
SHA-256: fc90fe2f73f48381567b014971221854ee2e1b8e7e184a4e8a906d80033ec732