Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7daf0927178d43b…

MALICIOUS

PDF

135.7 KB Created: 2021-08-26 06:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e35865d0e8a79ee34c613520ae465f91 SHA-1: f0b2d79c5c49dfcbf9da01fcefad26ee6149cbc8 SHA-256: e7daf0927178d43b1f36cef0a3ffc7a593735566a58a181e351c4033ffbf99c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially malicious URLs. The presence of embedded URLs and the structure of the document suggest an attempt to trick users into visiting these sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://pixomot.ru/uplcv?utm_term=frequent+questions+and+answers+in+a+job+interview PDF link annotation
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/r27b0fhjd9memidbvqq3ks46ji/zogakiladejinedezuxi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2bbf810ea8---35875929210.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/57i0cjjou6tloj76ilqjbjrph9/nowedixozu.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/relebojugewewomuror.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafdf2e664---67347702668.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/95821488981.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/53655251635.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/fed7d7ef7d6c8c6066a45a8673dbc664/34138379167.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08bde43f46---fajebozekixoritixapukesag.pdfIn PDF document text
    • http://www.moyekolodin.com/files/50160331408.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/80310040037.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/79947384547.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/j47aqg3icefor4g4eoe2jl23f2/96351524096.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/66105247748.pdfIn PDF document text
    • http://yjccnc.com/upload/files/3631963677.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852d13863b3---zevilanufabazudibug.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/1ba1516a3ebcba792e39807c8d37f258/88980052383.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ac1ed76c01768f4e98f32757cf854718/32712554236.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074260a8c7a3---54281115010.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/8694903188.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f24506a81a2---6613519648.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/88981cf151c58ffac52f732df0813ddc/tefapeduge.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/wovijaduxivi.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/mufupegezufisawolo.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_off0001aec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEC6 10840 bytes
SHA-256: 12541e53d243ae449de4753603d546736b6bcab439bf9317c13aeae4071b34e8
font_01_sfnt_off0001c7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7AF 17624 bytes
SHA-256: 6b1ac049d9bc5cd9aa65c0457baa5b795436dca704a41f59a53753508d185fd7
font_02_sfnt_off0001f5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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