Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45fa32069aeadea…

MALICIOUS

PDF

86.2 KB Created: 2021-08-21 03:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1b80f6a568c26c4632ba37f7c844b519 SHA-1: 277a52544ff29278dbe021664cc13281a227ab57 SHA-256: d45fa32069aeadea3aac94885a49506c1683da1c1cc5ff7e24848d34434e9938
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958836164a2---92034544053.pdf In PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/jutijojudojex.pdfIn PDF document text
    • https://cecprint.com/images/file/45570436035.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ffer52c5vjdb9uns9bkpoh5md4/14068764937.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/c3e2705f24bfa8f2e7424a7c5dc7e562/52679098050.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210707002944.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/51731928009.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/sanujufenokod.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/6131271959.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/41033458537.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f483a4c370---28888927231.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/73014879988.pdfIn PDF document text
    • http://healthywithhart.com/res/file/22876530626.pdfIn PDF document text
    • https://aneri12.eu/res/file/gokinodarego.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/43277118207.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/37613279562.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021081620485459.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/fc5vtb6gh6hfhsissu5vh4a57q/moxurixokolonibunasogidef.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/38803259204.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb6c9effdf---45964497763.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d024072538---zivitovuxevokurufojiponip.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/78770774991.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/lefufokikizatakofexux.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/68069859776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=sample+application+letter+for+employment+as+a+teacherPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/belasuvisotus.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_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 16620 bytes
SHA-256: 02b9ad7efd2eec4f456c52888a1e83f586b5ede4746dc7edbb573c9c6acefc07
font_01_sfnt_off00011949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11949 10936 bytes
SHA-256: 28403bf253fc80d45dfb7ceebc49f4480a3762dcef0a75ca2bc75d7dae86e536
font_02_sfnt_off00013269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1