Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec6681fe830801f…

MALICIOUS

PDF

69.4 KB Created: 2021-09-24 23:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 919607def6c2c9c8a6d3954d80991220 SHA-1: 59350b011a4f54f6cf8830c7fcf903fc626d34fe SHA-256: bec6681fe830801f2e7dd061bf8c99eb30388c742b9f21c7ed75b87565f63968
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and multiple external URIs, some pointing to compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The document's structure, with minimal text and a full-page image, is typical for luring users into clicking a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • 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 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://excellencetogether.com/img/files/file/forigutemowimukonapozes.pdf In PDF document text
    • https://redac.ch/upload/sevomijazuxit.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/kalodubowurego.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/45145082871.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210918041638.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613083689e42e---wefimukeseladajige.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/97818081284.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210913_180736_3290.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/85346452402.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/44643864004.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613507d83bcfe---4643816372.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/panemusifidopatarikobi.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/92406245310.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210908124442.pdfIn PDF document text
    • http://thietkevang.com/upload/files/mitomofasowedokururukavag.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/gisurinekikolipatexi.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/5a5rclpbo2jkfs7a72n2lumbg9/zubax.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/romonegefepawapabe.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/44772298390.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/89079416240.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/jaroweza.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43483601386.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/79208227007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=adblock+chrome+extension+iphonePDF 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_off0000b01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01C 10932 bytes
SHA-256: 816494b2186f937273a54387fb1b578ac668e543a3b5b1013d6c88bbd7b57d5d
font_01_sfnt_off0000c906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC906 14600 bytes
SHA-256: 9ccfd38ea67da0e0f8f04d33df9cfda9079ed9bf76479fdddfb069f1a2eac318
font_02_sfnt_off0000edd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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