Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9a62026b972a9a…

MALICIOUS

PDF

72.6 KB Created: 2021-08-09 23:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 923f0adc541c88b1bdcec9f1359c5b07 SHA-1: 138f21dddb4722b4971f01d0412f7804a82d11e0 SHA-256: fb9a62026b972a9ab7251b549376d151ad8981c9ccb5a2c45d6ac3a8d89eb1bb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple compromised CMS upload links reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/s2mhkglpv2e169semnphb2fk8e/fudafirewapijuleku.pdf In PDF document text
    • http://22743333.com/userfiles/files/88072095518.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/movabetevefiros.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a999a7dfb4---zatova.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc8f7cd1d16---73443104577.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160adb70f1d00f---31305744010.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/oaqtnnv4lkpviucfkt4hba8r96/57014900912.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/egacoqi92hanvhegb0bcchd78h/gokikatiwejixuruxaxemifi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/nalebijalexogiralesegu.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/d150d1ee6105d7de0a9cc177bd5bcadc/ximufovakalemopeget.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/ce570cb626225e19c300971fd6c36a51/zewededalefuzoperizixaw.pdfIn PDF document text
    • http://m2m2design.com/userfiles/wujumujafopuxizuluzegib.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/99f8d3c5847fe5b93d96343067b35d87/56591218401.pdfIn PDF document text
    • http://888chji.com/userfiles/files/kilegokezemazojij.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/pexidedixujawi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/1e2660b7cf85e316b970e6a89e75c963/kubem.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/aioj8g56sa2r03rd1afjmjsabo/xovaxag.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/63063485322.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/82d853e9391267b3b37b48330d493b44/piguju.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/e0tjv5od1o00kpfht27brgkn9k/kexavixoju.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a321f12d5b1---rulojozedematabi.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/62561076506.pdfIn PDF document text
    • http://519pf.com/userfiles/files/zoxojega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=coolster+110+atv+parts+manualPDF 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_off0000b904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB904 16744 bytes
SHA-256: 70812d1c6c461a0e96d3ee3e6134ee33f814d421196949525d24a74fd32307f9
font_01_sfnt_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 10692 bytes
SHA-256: cb45e3a0181ed4bd122d6e1260b6316461a9180078e8f1b5e8a9417a90a66db7

Open this report in the interactive analyzer, or submit your own file for analysis.