Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ed6e3c0c32c7cf…

MALICIOUS

PDF

112.9 KB Created: 2021-07-22 02:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 634363a55b773dc1e8a2fcbb1f603ad8 SHA-1: 0af35064036545e19a23f89e4a4e086b762dc3cd SHA-256: 98ed6e3c0c32c7cfb1cbe13a2b7d47a0bcc8fe645b23ba6730e5bb07363e85cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous PDF links on potentially compromised infrastructure indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/3d921a78b64edcbcaac44de7d73a86db/sipexikibusogizimafiloro.pdf In PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/723152b99d5a66241c8997714ade9b0e/zewafip.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/73768887953.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/kopivawelof.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2e459eecddf9e2f4363ea1dc6a9f7ad6/51624551075.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/361689376.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/a10eed6983a64b6373ec28691a62cdfa/49094570533.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/318718ab4779890b412e9e4b4f29e501/fimarun.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/74383651390.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076738322545---zamumuvojug.pdfIn PDF document text
    • http://hzbaoyan.com/images/upload/File/72682097514.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/34906519117.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/91457566607.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d28f48ee7---zixixukewakuga.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/mabufaralipozisifevojugux.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a8797d04c3743eda4abac86a2a665da/43744652603.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089ee717e569---77456260523.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/gojafavodiririxidida.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606da032a22bb---mipiki.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ptksb1gajb650vlikhtd4eatct/52077501929.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/xoretukozox.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/c9nuk327ddm0f5unimdrlmgtan/giwudesomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+lavaPDF 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_off0001563d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1563D 9808 bytes
SHA-256: 18110ee2c27a41011f2b2112f8c696ea73680b0edbb3afdb85b73f773043aefb
font_01_sfnt_off00016bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD6 19564 bytes
SHA-256: 2f4da0dfc5b8318917fbb0af83bd71e1866c517185b0ff65357e8ab5c3b2b91d
font_02_sfnt_off00019e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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