Malicious PDF — malware analysis report

Static analysis result for SHA-256 457e45d6b6f2e44d…

MALICIOUS

PDF

602.6 KB Created: 2021-07-25 18:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 76ac8a20c717fa9fa6f8a76afbdf8522 SHA-1: ffef3764babf793f2f1b3527059c7143339b09af SHA-256: 457e45d6b6f2e44dc21e782872739e5850d4889d89efb8e1713f3a27b6a7d54d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of links pointing to compromised WordPress sites, suggesting an attempt to lure users to download further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may also contain instructions for accessing password-protected archives, a common tactic to bypass gateway security. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://exmar.it/foto_fck/file/bemeditesodipadu.pdf In PDF document text
    • http://primaneighbors.com/userimages/35664859198.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/zumesux.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce2910fdba---47277519530.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976d2bde673---56071121131.pdfIn PDF document text
    • http://broadmoor77.com/clients/39738/File/tegavemamabarakepulof.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/50531925984.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021051617425669888.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6c856ed4---kupeluxufewipu.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a6316f8387bdf9ff52e6654ceaf7a213/xugeferonof.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/sovolabiwodilanasowurixo.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f35cc0cdc845110852f1046bd38196d/pivezamibopipivufitomuzes.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/pibitasevonoteram.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/39dd93dgkm4qkgoo87g0fgon0f/rowibaladid.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/zogazeradogodalodojaliga.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/toperigadodawuvoluropo.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/15597521825.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fa572343d---16864789486.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/788f5308287ddb13ed83135252fb73d4/biveveselitejubajugagonoj.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/42180779103.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/9i31j7b3e5ch611u8pl0gkvtlg/fizodedimuxovofupe.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//navujubimorosejudobefa.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/gefuvan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=uma+mulher+na+escurid%C3%A3o+dashiell+hammadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0008e661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E661 10908 bytes
SHA-256: 3fd00385d11a600e71c5c1607b4ae244380d6653e344c9bf2c1486acb74bfed5
font_01_sfnt_off0008fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEF3 1868 bytes
SHA-256: d853afd68ace1de4f4bf3a40955792aa278f304c332325f4e79fa3c0ff4f6fc4
font_02_sfnt_off000907b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907B1 21972 bytes
SHA-256: 4ab3d933eb2be8a33e0949ee5a6b9e1985f71768dacfa920791a1412cf22722c
font_03_sfnt_off00093cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1