Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cad9605d11ef9fa…

MALICIOUS

PDF

97.2 KB Created: 2021-07-07 20:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 371e237338c47e22de2e0ea2ae6b19d9 SHA-1: abe3aa86ac1b95219665b046fbdb5c3ae8907efa SHA-256: 0cad9605d11ef9fae8a32d7a616b84985f4699db0fe910850a6a0294e28fe95f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://coretry.ru/uplcv?utm_term=johnny+tremain+test+answers PDF link annotation
    • http://aucoindeshalles.com/menu/file/fovunofalitalegiporub.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/sakabiwe.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f6bfedf7c2c19f0d737e985e00e7cbd8/sagaxitun.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160849bc829fe0---kopaxolo.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/525b38657316af2309a3341f6aa29761/jakidorofufizaparuda.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/27411862680.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607049a9e4ce0---38477194621.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/fikizobopopawan.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/9569292168.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c7939b5cd1e---ranutozuroves.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/474d8050bc6aed5fa7190eac384f16ce/61055443636.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/6h1j652rdkimgfbsc3q6csq372/pezegoxupafekumonil.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/zugodavagi.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/kinikorujaw.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16088cc530d217---28204213174.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb91cf1cfb---tiloxewajuvikemukerekubu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/b5fmampo0q7gq0dvd7cvtlmkd5/22066748950.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/a26a4b35226fad50e1487674011d2f5b/lokemejidokuzu.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/pemelunulugo.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/b5h34jg2ibk8m1gg14lmsgh89o/jamebi.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/255d37d837b3a6fc56e4f574b0d57ff2/galupeluredobodobox.pdfIn PDF document text
    • http://aweibel.com/Photo/file/rorefinarivuwiriwemorixi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad171497f6---sizum.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9426bba60---93171888673.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/numetosikas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C19 10516 bytes
SHA-256: 66cc2fbf4d350d32bbfdfbbd5967a936b062608f0b891543975c48129ae82af0
font_01_sfnt_off000133f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F5 16848 bytes
SHA-256: 30e691d13a7989c0a170e5c08c5f8a37587f1b34ced1b8547f804f72730064ea
font_02_sfnt_off00015f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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