Malicious PDF — malware analysis report

Static analysis result for SHA-256 82be696afc47a385…

MALICIOUS

PDF

88.2 KB Created: 2021-09-05 20:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: afa6c34fe86794141596f0e513a6f420 SHA-1: b39d4b3510e203e94eaa311b3c5be2725bfb26cc SHA-256: 82be696afc47a3851f614636060b60653db5ee9e0db068031e3ef43408edcdb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the URLs and the detection names imply a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=municipal+waste+management+pdf PDF link annotation
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/fd027eba1197c1fe370b697fe02f340e/luwoxarelafekoxibafek.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/25983260433.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd40c024eb---6609038809.pdfIn PDF document text
    • https://ms01bet.net/contents//files/gowuzepamidu.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/81144879851.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de0aa0c2446---81834735234.pdfIn PDF document text
    • https://12tiga.com/contents//files/71569192909.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/movowapufajoravo.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f71a62813f---87519472277.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/fufegasotija.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a470a1269---61268142919.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/gm13palnuk0evcdoo1np2851f5/21720056296.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xajajiweluzarulap.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/q53vuh7kgq2m1f9jtai8pn67hg/perigiwujavat.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/derekove.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/33607525701.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607033b7ce00d---muwaliwif.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607566626a3cd---81374263053.pdfIn PDF document text
    • http://sdds.be/userfiles/file/tazowodidugejasivepugated.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/77602946479.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/2690832305.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/31962089003.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4f5531e1a---tuniviz.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/18539639101.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_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 18388 bytes
SHA-256: c81bf67abcb7dd512e85b76d0361e0565476d69c7fedd3b1ed1c6439e43cb4ae
font_01_sfnt_off000121da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F1 10924 bytes
SHA-256: 6eca4368aeedd61433b145c7b61770fc64816cffee2aa57b6e316c38b4f6b621

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