Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae419872beb6b46…

MALICIOUS

PDF

76.3 KB Created: 2021-09-02 05:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02fd0084bd31766eb86adcbacc68e8d8 SHA-1: 7b31fa17273f304a5a79aac8fe57bf1f7c648648 SHA-256: 6ae419872beb6b46cb2955ee83605785c8d32db971bf20515d9ef31c390443b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nomylo.ru/uplcv?utm_term=live+lounge+tv+apk+for+android PDF link annotation
    • http://chouchoudauphongongtay.com/upload/ck/files/24467914540.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f151c46640---82744321337.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/vnk59k674unlujt67b102rrtv4/34867241490.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59cf981503---51301459640.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b64f449cf2---36836400755.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/lilez.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/80ae40aecd30f6b6a65ba7cbcd446d7d/dinodo.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16087021b7526a---10008221904.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/65832059821.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/13403474181.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/96330745058.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/3a4d72ce4ad56524c082d2bae4d5582d/62816126728.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/bidoxajedafidudipelita.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/tipuzixiruvirujanukavug.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073076fede5d---vanaxakokonuxud.pdfIn PDF document text
    • http://air-con.ru/upload/files/kikesupefewodetizeperi.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/uug36iq23aq1i5lm5f2q136tst/wolofivekupiloveg.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/mirepovisesapedofu.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/30607387145.pdfIn PDF document text
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/vilejezanaduridikaf.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/tulexoma.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e51a1b08899c02416d40fa441e60db60/45567805.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_off0000c83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 10720 bytes
SHA-256: 56cd46cafd43a702bbed2d2729501946a3a459c02f573906ddef2de3d60b40b5
font_02_sfnt_off0000f8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DE 16456 bytes
SHA-256: 2fa59cc6ad180412965e521b5b33c6b4c906dcfb28b6f640a1e4562496bb72c0

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