Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba551fd160bf2ed…

MALICIOUS

PDF

89.0 KB Created: 2021-07-05 00:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3aec5c71fc0d54f9a088fdd1e5158fef SHA-1: 935d44bd60b407f8fe320afadd28021f301cfa29 SHA-256: 5ba551fd160bf2edb6e9b51244a19c57eb9e5ca58eb92417869c5f15732e9c10
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

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 http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160afc0d1c4103---wowivubigugow.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/adc1a059ee9547e3e333d9ad2d110758/69597552764.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c0416e0fc---76854481372.pdf
    • http://solarhomepage.ch/fckeditor/editor/images/file/nisuwuxukujigiv.pdf
    • http://xn--eyt274i.com/upload/files/ralofigederutazajofun.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d027852caf6---jebaje.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/18d25ac68f799326208d42973ab22db9/rowekazukiwifuxopanax.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/61420688752.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3fb836156---mejixivamexexazoki.pdf
    • http://baraanduliaptti.org/userfiles/file/43030068065.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3290aba98a---86996609915.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3e65713d695cbee7f1e09ffcd2b58ab1/pobutilaziwofibekesojipe.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833b81d6311---wevowofumupenolajotosuzo.pdf
    • https://terminal.hr/userfiles/file/loxabezowuzuzukagesawapu.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea13acd6d8---xuvanogi.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608d427063326---84657204246.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606dec7aafd72---28603309566.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c731dc3bfd---jebugafanomijumatokiwixe.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/efieooqglbrustaq9ei8qf8i7v/rapodakeliperepaligo.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/26311797714.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b43cbec9771---46743065939.pdf
    • https://jaiminsales.com/ckfinder/userfiles/files/86110191871.pdf
    • http://irk-yoga.ru/upload/files/65366225875.pdf
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/bafogon.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=derive+an+expression+for+pressure+exerted+by+an+ideal+gas
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f628.bin
b93ab95b23b5627374a844dace9685f2199c884ff6d35773ba7f7381ec6d75bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 11196 bytes
font_01_sfnt_off0001101c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 16792 bytes
font_02_sfnt_off0001282e.bin
e98324037e6a54e2710290a46aaac4997696310cf52d956f1bb554fa62ec0517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1282E 17460 bytes

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