Malicious PDF — malware analysis report

Static analysis result for SHA-256 6122050cb1f311e4…

MALICIOUS

PDF

85.8 KB Created: 2021-09-24 05:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e84d32e046254dbfda86fb61258c6e0 SHA-1: 0a480689c3b9293b914d859cde676d360f1d2f47 SHA-256: 6122050cb1f311e4988a350d9bb5265911992b982dac9b7974f6c71e40bda531
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised WordPress sites, designed to trick users into downloading further malware. Heuristics indicate a phishing and trojan distribution workflow. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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.
  • 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 http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614022812e6c5---vukifuzoxorogamoko.pdf
    • https://deesudcoolingtower.com/userfiles/file/maximizaxalovabobekeg.pdf
    • https://karolinanowak.com/userfiles/file/putibaxo.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/9298c8adfe7fe30c872397ed0576ab2a/9764320743.pdf
    • http://aircond.md/upload_fck/file/nazefefavinizopifa.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161365aacc071c---22120961665.pdf
    • http://adamlegal.com/userfiles/file/xiloxogimasegolavupaku.pdf
    • https://soportedevida.mx/ckfinder/userfiles/files/xuwip.pdf
    • https://semut73.com/contents/files/panoxotejewilewo.pdf
    • https://guptajimarriagebureau.com/userfiles/file/55480411636.pdf
    • http://93564497.com/userfiles/relizol.pdf
    • https://bostoncake888.com/UserFiles/files/32787721861.pdf
    • https://cribpointonline.org/cribpointonline/userimages/file/vabakizifixopedobuwigaru.pdf
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/domukorekodevexilubukosu.pdf
    • https://wotfiles.com/ckfinder/userfiles/files/bigobetudosot.pdf
    • http://ihdbd.org/upload/files/2331958229.pdf
    • http://ordineveterinarivenezia.eu/userfiles/files/jiviweritinazosam.pdf
    • https://newshieldinsurance.com/demo/gsa/final/images/file/83710005279.pdf
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/zirigebiwabi.pdf
    • http://generaltubi.com/container/ckfiles/files/makuvuwilusenenifu.pdf
    • http://nadiadsa.org/userfiles/file/44527953328.pdf
    • http://abogarestudio.com/userfiles/file/jodekutisasiwudidujadu.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/gen44jl3m4bruea3a0hqg4l030/lazumijowo.pdf
    • https://abhrian.com/userfiles/files/posofowogatep.pdf
    • http://irollee.com/userfiles/file/rodiv.pdf
    • http://enidental.com/userfiles/file/20210920194807.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=3d+sniper+mod+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec23.bin
45d76b154cb6d3f21b7218bc630b1843a7aec80604165328be77991a0e5513a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 10576 bytes
font_01_sfnt_off00010433.bin
bfae7efa0632a0a247440176376a63518c646616ed84f8afce49c24b68d4b0b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10433 17576 bytes
font_02_sfnt_off000131dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131DC 16792 bytes