Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae491a78109f348…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 21:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9b25db6c77e174f021a771ced621fc85 SHA-1: 196e4a5f0af63fe8a3cafc44af3444cc56925bec SHA-256: fae491a78109f3484af418717e10dd4c7320b6fb06eecf816e7f313841ba1462
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to direct users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e82d14153---90916551790.pdf In PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/0800aa3a412e33deb151d8de3fc09287/savinewopefodavovasatu.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/gadibi.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/96545977130.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eec488ea4---31012796238.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079708ba0b0b---xokomogobabebiminalivalon.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609269ec589c9---85074033495.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a92a8b946df---zuxutojazid.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/hkg6cmoulidbs0uttu6qffmcu4/dorome.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/36999998992.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709de0cca18---rusomuvawufifavotiwixitaj.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vdk4cbta87frm4egds87f0ct84/34246108483.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae1872f9ca---zavepelovuwatases.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/joranupowogil.pdfIn PDF document text
    • http://accountingworld.in/singhania/downloads/file/luwazasulivavepere.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/b8rkgmjc2q2tr20vd2u1sfpa4q/dixamezoxuvajodeje.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/sgpqs90t2uqdpfc6smsq1co6g1/50280261561.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/43d555d538762a69758bd50619deeec9/vumewojekufusosemugavu.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b7682d2cd---13087660423.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2c4380a23---bozamabilurepulutitolix.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/kexomefuvemegoxelipaxel.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3b38d0e85---68352845374.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/29912551626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=standard+deduction+over+65+2020PDF 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_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 17468 bytes
SHA-256: 642180f3454da2ab6eb1043562906090bb51d7175861149df2cab6e2c05775ee
font_01_sfnt_off00011aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13301 10936 bytes
SHA-256: f7879f6a5286ba7b53c67b48b7378cf3a7be4dab7e1e92146441cfa6b4f665fe