Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c43b57c60ad8a9…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 16:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d822272b6dfb60a0fa33e3d7594c08d4 SHA-1: 83c7b9e8fcd40bfcdff08c3e1a6aab89c82f8590 SHA-256: e1c43b57c60ad8a944187f57f231f8a1419020587b58b3ccd9c5eb2f21ec03f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and presents an image-based interface designed to trick users into clicking a link, likely leading to further malicious content or exploitation. The document's structure and numerous external URIs suggest it is part of a link farm aimed at distributing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/wuvemavu.pdf In PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/81932716479.pdfIn PDF document text
    • http://webursitet.org/Files/file/16883151052.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210923115829_jbudyu.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161486c1adfd71---14440894636.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/jikofisivowowepag.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/12461581441.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/jusarojigasifug.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/719251249.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ksfd2j72h4rmerbebjgi7uvp9p/70674669682.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/27977778134.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/92228798322.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/61438503369.pdfIn PDF document text
    • https://flyags.com/editorResources/file///ximojusovomivokalixejudo.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210911/file/1631324345.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/xasigeditaraxujedagitenev.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/denurobesupebop.pdfIn PDF document text
    • https://cmf8.ir/data/file/100253309.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/wojeduzusot.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/gavuzekukidejigugavexi.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/fexajojunimegagofamasug.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/94534244103.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/66974645803.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/97970189300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=i+forgot+the+pattern+to+my+android+phonePDF 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_off0000af39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC750 10796 bytes
SHA-256: 395e7a7205d5f69a07206876ab751e5f3a409830b3181a9a76835becceff1774
font_02_sfnt_off0000dfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCB 14444 bytes
SHA-256: 9d1d692660e45bd23853dea58a2f0d252bd5c9a3866a99f7411216425297bfad

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