Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ea3f8aa9b2f137…

MALICIOUS

PDF

85.6 KB Created: 2021-06-30 13:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2482c06c3beef44a774b2398ad4d3399 SHA-1: d98c39dba0b8a6c64742ffe431c9639f45e65760 SHA-256: 70ea3f8aa9b2f1371830d69a3b6cd310e82fa4ea262249d5855c02bd4ab39963
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://gocreate.termall.pl/upload/fck/file/pipubaruzanexupigapal.pdf In PDF document text
    • https://quangcaowebsite.vn/uploads/files/85698469605.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9aeag4pmps65nn249gu304p0k2/5000580403.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/16249095565.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/bawawi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a35e9a9b60---40143970724.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/0b349758f526d20b4b93e6ea7d832129/gorevemolefijusuvoleva.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/1a3557df7d5bf52873de6df3798bd390/xaziwavifumirokusix.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f111e7c9---22791845439.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/483284682.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/nodojizefexowedipabebakaf.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2386e3a468---76791025773.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/rimelemuxew.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/89366829107.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/106857c84f775073393ac9cf5586b99f/40012855717.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/gejew.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/3e30b9b1678460b6e8a171ae57ed0fb5/38575500069.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/widisunaguwizi.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607b02078e739---10885743089.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a092f550d65---witezefejoxaborumig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+bible+verses+for+good+fridayPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F3 16944 bytes
SHA-256: 8b8ab09a54896c9c12da33af2cb2ca30be3e2dea27feb57384d1ff34bb35a724
font_02_sfnt_off00013019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13019 10796 bytes
SHA-256: e86dfdd715ff4a3b7fe02017e73abba0e4c795087ca4c6c32edb9f074adc3200

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