Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e873a6916b72be0…

MALICIOUS

PDF

82.6 KB Created: 2021-06-22 13:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 81244dc0a4874ee39fe109ee64fea520 SHA-1: a15d2df63353c4ef0d131fa38e006dc33096c105 SHA-256: 9e873a6916b72be0f64f2678d8302ad696e6ee166596b350661e4703d0879882
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external resources, many of which are hosted on compromised websites or disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/fae4c0e8f46d151164c1a30c502bec71/dalifudafuzofoziwoz.pdf In PDF document text
    • https://tmtteks.com/files/81766289242.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/tfg1pi2alvvvso1s1143oree6a/46940108578.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/143268e1b45af8c3305447f25cb107f7/34339802543.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/finewukizaju.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf53d37c2b---69971201453.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/kokof.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/akuei4stqsqe0b7pthrkclor32/nudiro.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092e3351cdb0---zuromumi.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/r4qa4bgppl05hborll50uiapkc/85440001085.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/967bf6c7k665nsqklrvo9enmsq/zabina.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/mojixibuvupidezi.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/61902650261.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a07dc3465b---25415172049.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7568e47c1c---tafizovevujebazizore.pdfIn PDF document text
    • http://houselandia.ru/files/61707973982.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7b4c5e5bc---fobax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cbse+7th+class+english+grammar+worksheets+with+answers+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 5756 bytes
SHA-256: 2b489104539497491084bee056c6d65f2e9e632efb0606272473868ab04ccf25
font_01_sfnt_off00010b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B30 10500 bytes
SHA-256: 6180f0f2730e0244c649cc764a77f547a81c1898805e75bb911798110b8f4f46
font_02_sfnt_off00012ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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