Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e8d8f4c10ac54c…

MALICIOUS

PDF

101.2 KB Created: 2021-08-04 02:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 07dbbbb08989c308582e42e5e2815cc4 SHA-1: 069e9f198e4e8d1445c8acf2b6976ec6373fe823 SHA-256: 39e8d8f4c10ac54c319ad9f1ed7e380cab02869e56eec7ec550a6640ecb61a40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's used for distributing malicious content or phishing. The embedded URLs, such as 'https://inwebjor.ru/uplcv?utm_term=alita+battle+angel+3d+movie+free+download', are likely part of a campaign to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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=alita+battle+angel+3d+movie+free+download PDF link annotation
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72205d3534---30072743709.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/zoxapinusarexotavor.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0ac93979---17576749952.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/pugunivafoxujexagaj.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0d6342201---73846813593.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/dowewesatore.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3p849qllotp2h0an92qpekb2ar/wapelupivezedizojoludako.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a172da26---fotefanom.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/19185622718.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/vodupum.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/76638863023.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/b9860b28c736b7a394a5a35d06680960/59418994928.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b1094202ab7d48976686f6739c5d12d8/zimubevinivituwibixeraj.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/83752565957.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/hkrbm9o99eml7nj7kepnbgll1j/vadesuwuvupej.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b95c32be23---12852418537.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/94023934194.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/4ae0b113c2a95009e54263639c79d2f6/18571588365.pdfIn PDF document text
    • http://teknis.it/userfiles/files/9037425472.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2dvmmobuq2gnbrdu26druadtj5/92961072100.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c277bb04697---nujudutedajevojejibusaga.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/zitogubomumapitaganaw.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/kuwusasupaxazisakuxer.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001116a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001297c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297C 18968 bytes
SHA-256: 6e9a6143aef2c855eb62cd8bc2d60d8afe0c48f51831d7b92eb751ca698845f3
font_02_sfnt_off00015a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6A 10972 bytes
SHA-256: fea944b73c88eff9bc43afc44968dde5ff7acdb6631cc612e9d73a939f1a3e04
font_03_sfnt_off000173ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173BA 5380 bytes
SHA-256: 802f1b14354b3ef45f0e1f2a5aca8ae3ef6288c6c7f2822b9008f9dfdf0540b5

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