Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea90f0aa65192ec5…

MALICIOUS

PDF

68.5 KB Created: 2021-09-27 23:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a685b5e5d3a2932a4eb890a02fa2f7d6 SHA-1: 0a6fd81c0ff8e1e4f9820ddb0200045e60f333ea SHA-256: ea90f0aa65192ec5b45fac0738a34c93657a95541786fb6c8f3bd460bd5dbd77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and URL patterns are consistent with known PDF-based lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://huntic.ru/uplcv?utm_term=wombo+ai+pro+mod+apk PDF link annotation
    • https://seeandhearbetter.ie/img/shop/contents/dovadexutorexanol.pdfIn PDF document text
    • https://12tiga.com/contents/files/4875922073.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/bff3a4d8062545e2481da6651b40db57/livilubalexunejadigunebub.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/kexewopabitazuv.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/22292655442.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/xowotavisokunodabiwal.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/6a76a736e79c2b0c4e690d20bb5b24af/sizijetevuxijikupexokezid.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31627543745.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/tutibutomijobixar.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/jirimufarogopig.pdfIn PDF document text
    • https://12shio3.com/contents/files/55096756351.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/35589436287.pdfIn PDF document text
    • http://www.mattig-accounting.bg/fisiere/file/27916826220.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/gigalurodexuzatimeji.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/xofofamezupamis.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/13201867993.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/92726555320.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161454073eff73---87662814816.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/84769305316.pdfIn PDF document text
    • http://test-immo.com/file/31206455405.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/54158777737.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/jewali.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/80332347882.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/muviledesarovodododomelep.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/fopitomutomozixejofuxo.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_off0000affd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFD 10232 bytes
SHA-256: bda0aa3af50b86293b19026fac6dbe03acaee41cf901e245baf2d2f265ff3a5c
font_01_sfnt_off0000c6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000debb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBB 14720 bytes
SHA-256: eb6a2154f8777f223d5bcc4b78900fadd099367ff72c144a0a60a28392e0ebb2

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