Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1a27cfab660791…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 08:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc031134abecc22b32b9df2b3d3a7c82 SHA-1: 06e86b0ec5e7e59eeb959a05bbd7e69296242780 SHA-256: 0b1a27cfab660791a24d1f0895e2a490af4ae86e40aa82c6cbefceb2cb3cbca8
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links, including one pointing to a compromised CMS upload. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=the+escapists+2+pocket+breakout+free+download PDF link annotation
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/suxigodigujonigemajalawut.pdfIn PDF document text
    • https://e-midas.ro/files/file/tosiwu.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/wuribelobowaguzabeto.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///77950775509.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141fe233fa1e---28310957732.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/risolidosurojewuzefugir.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/67734feeda973afb173ad934f7bb80ee/dinadinemiwaxin.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/71650723631.pdfIn PDF document text
    • http://bastola.org/userfiles/file/xanaxoludomumisoxirebude.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/12704641429.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/56403131348.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/19513405977.pdfIn PDF document text
    • http://z500.si/files/43986695707.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/0bdkgoice2g7njf8678569q6d7/84884384725.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/rikizeluzawut.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/2031430863.pdfIn PDF document text
    • https://ekransamara.ru/files/gibufiga.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/56120398254.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9a3181a35---80979068671.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/roxalakafogijefupegagari.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/patodavofajowari.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/10156293267.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/42595483959.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/a4dbd991546af5927374f226299c5d68/motezovekasemurizazuzapot.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/54441770455.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_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 11220 bytes
SHA-256: 8957e5fd63148542e43f3ebab249b337f00e3ed3771f17d1c58cec93f583e4fe
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A4 17800 bytes
SHA-256: ac129e17f66eb08f5140bfc5646c9bf231cb788472616b5aa274bc8a58e57cad