Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0562e19dba30ba…

MALICIOUS

PDF

86.9 KB Created: 2021-06-26 21:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cecaba0f8712a0f9b720d358de5f947 SHA-1: ecca86431618f7087f8c1e31ae51e6786e984e61 SHA-256: dd0562e19dba30ba44c3ccaf48b94ad45418a09cd670fbeafeb822bac75bb5a5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites hosting PDF files. This behavior is characteristic of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/9f8e286cd193550c3ce5e93b83dcf99b/karenimezewikuv.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/kesajsi4no482g0rtm6ctiul8r/wojeda.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/3j4mbgair2n1lqihcubqd01k90/kudadeluberamubisukik.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee5b599a3---vigulifu.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607966ad27469---xanolosuxurivewosodan.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c634479f---jisekejugorowajewenazej.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/f1b0f077477220c93d947f03766982ec/lizegifojozivawutize.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784aa459bfb---71353879790.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b630130f4f2---bijazobixunu.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a523c3439c1---82037860777.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086681aca771---82456326573.pdf
    • http://kezmosas.hu/files/file/55653818976.pdf
    • http://bright-mineral.com/uploadfile/file/2021052805290644.pdf
    • http://jngf.cn/files/file/fusunonajof.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dae57a28b---sovexugasiradigubigu.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160876d339dfbf---35631648145.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a71371272d---xizejezitufirofevuzu.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb2549b8a5---nixesuzuxalupupotamo.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/5s1u46nfnfr670r6cm25v1k555/9761852102.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5014a65f04---nerumelulimupuwimuxe.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/73fe7232ff0285f692884801c649ea5e/wavirasoliriruvota.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/5993e20a57ad6f30d31c9c12a99e6215/kejisemew.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/30393c27bdcc043afe2ff07ee338fc87/5193720623.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=serenity+peace+of+mind
    • 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_off0000f007.bin
633885aa337a0dd13c7be9a09340c32ee2b022b84230aeb51951fc21a9d25391
pdf-font-stream PDF embedded font (sfnt) at offset 0xF007 10756 bytes
font_01_sfnt_off000108c9.bin
b5c886846e11fa719a03ea20d9efa143d743d36fa1953ebbeab783d6c742dc4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x108C9 17856 bytes
font_02_sfnt_off00013668.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13668 16792 bytes