Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f965d801fcd657…

MALICIOUS

PDF

84.6 KB Created: 2021-06-28 00:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1ae10f6bf5ad8370c49d2b90352a7b67 SHA-1: 06954d33bc07275e34b87605e54e269994f4f320 SHA-256: 00f965d801fcd657f8c0ac176f3f84da8ffed3a269bb0101014fcd6b970272ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607446ec2e2cc---sufamuditinibukosowu.pdf In PDF document text
    • http://0vote.com/ckfinder/files/zisinotuvurajikamogudaba.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c851fc6acf---99294904405.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/muxododujazogifesuja.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb771897253---dolekapujinawebek.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/wimaludizebikawamemo.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/25271377300.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bce7cd607c3---birevax.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608659bebb97d---40515695635.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/0e57e17ba544b099ee788a367494f447/27961550758.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/10183246242.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/wokamuzinoxubezimifugen.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c57a621b9---dupos.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bed3dc72d6e---56962729468.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210627125833_1240388246.pdfIn PDF document text
    • http://clarasonic.com/upload/file/loredasivifinito.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/naxebakuvufevowi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/sepazapej.pdfIn PDF document text
    • http://eramaztravel.com/bot/ckfinder/uf/files/76934329420.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607650512b7a1---rojegikavusofovuwi.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16077192b3741e---towapogixaliweda.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/65658529359.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=a+positive+word+that+begins+with+rPDF 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_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 10900 bytes
SHA-256: 0182ba2b5874b540befedbcf77ec81aeb189c3a6f26ef4909e28ef075465479f
font_01_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 16520 bytes
SHA-256: 98463ee26044190c08dd83ea68ca77b445548b389dc53dc00211c7b396e1a142
font_02_sfnt_off00012b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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