Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ee0c0972fa97a8…

MALICIOUS

PDF

78.4 KB Created: 2021-08-16 08:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e14a234191c60ff00d0bbf9ed4afb6af SHA-1: 9ae172eaaff4547380f55bd75bb21e6930d08907 SHA-256: 32ee0c0972fa97a8c520cdf0181f695437a5d6d8fad8e17181ef8199f12b77aa
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It functions as a link farm, directing users to multiple compromised WordPress sites that host further PDF files, likely as part of a campaign to distribute malware or conduct phishing. The presence of embedded URLs and the nature of the heuristics strongly suggest an intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0468b6c9b---25458875531.pdf In PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/39c8a95a79ecfa470358a843dc75e476/wituxajowilojubeteganom.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210627_62F0FE553A95D4C8.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/70187105338.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/xigudawasemo.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c46128900---vanusu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/o3agkhloac1aouuo0mjrq4c220/naruxuvuxav.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/61323215777.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/0b830c99581410664c84e09078b9fd3d/ruzib.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/dijumup.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a7b09e8c---lukutuzula.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/gufaxawu.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/timuredukonofijuzuxupidaz.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/87193128827.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076828abeb5b---lonojimidotutixifezuwani.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/dopukonimejorawekezuw.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/semu0bo0mf8url54khns5n4lq6/lexezovife.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a766c2de8a7---megulifumenozulik.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d376250016---jiwigupiwobiledizoliv.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/88872845687.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021080423563597.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608303d80e1a6---14867619956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=one+digit+multiplication+worksheets+pdfPDF 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_off0000ce2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 11372 bytes
SHA-256: c3a1c14a80a4eb9f52c9907cd9de7260d311f443079af606415f933b4e3ea117
font_02_sfnt_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 16700 bytes
SHA-256: cbe25c292f06c7de027f51a399f530b03bce2610878403b652e8c3e952d94f74

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