Malicious PDF — malware analysis report

Static analysis result for SHA-256 96df0ed912d73eea…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 15:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 668cc0bb53c681349055630913540348 SHA-1: 593fda493074af99c8ad2b1009027ca95786fcdc SHA-256: 96df0ed912d73eeaaa0aea312146d630107a8d29fad3ad136e354778f61acf3c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress upload directories and disposable hosting. The primary purpose appears to be directing users to external, untrusted resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a03781491---53138606321.pdf In PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2411caa3f---65213425706.pdfIn PDF document text
    • http://garderoba.sk/images/_file/68079785711.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125ecf8a3cb4---tanevun.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/56590952338.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/004b58d1ae5c3cdf01701ca3df9c7d8c/zivavawujodudi.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/wozopisujudiforud.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/77046355204.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/eovho2oaku14t9n57caku19rln/20301209240.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/97661409732.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896add1ca00---zujizojuwenes.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9fa854c2e7d66f4f276474cacebc093d/zorerumisavuw.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/cc32fcec5f5e2c5867f9254914e8e74d/79713579624.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/0403c48c16de600a44284b79c999c760/zofezigarolive.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/fa70c2ded709e9036a085ecb450f0a38/wugefavagir.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075709fb05db---juwovowuziritizesive.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/59506165692.pdfIn PDF document text
    • https://basisnomor.com/contents//files/pidavomulakeluvuvisozusi.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a389f0f1f79---24362040142.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/q6c62biv439egtrb3v77k2u7t1/81187929634.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077355c8bcd9---37549339171.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/24997748076.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/vafefupexarobilalux.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/4883566812b5a2ef670b2b2ba524d6ca/simaguzesonesox.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/cb84d25eeebfd17e8edaa2ebe2c4bcb4/jipawufepanurededi.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073fda9ccb10---46283377506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=fluid+mechanics+example+problems+pdfPDF 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_off0000e64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64F 19496 bytes
SHA-256: 273c45564fb21df1a31a05b26b1a38bbded25913bf15515d4128d864b7416412
font_01_sfnt_off00011890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11890 11108 bytes
SHA-256: 9a15de85aa9e7be4293e78306496cf3d273dbebda0e4a5b74f8d2fe06052d0aa
font_02_sfnt_off000131f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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