Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0272dd40f858595…

MALICIOUS

PDF

135.4 KB Created: 2021-05-13 21:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f9d06fbee47cefb8dd13e833105742f2 SHA-1: 116c79467c3c629007f4e9caf7acf3d098466d4c SHA-256: d0272dd40f8585951afff1331f99df6c50527c50e8fbd39ce78ce9ac3800224a
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=tom+clancy%2527s+rainbow+six+siege+xbox+one+review PDF link annotation
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/theory_of_inventive_problem_solving.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/8177c192ce4fbb4.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/gikojoval.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/257400.pdfIn PDF document text
    • https://putifunefam.weebly.com/uploads/1/3/0/7/130775131/jurigezifezujuguso.pdfIn PDF document text
    • https://seduzitatadobi.weebly.com/uploads/1/3/4/3/134371103/bezeg.pdfIn PDF document text
    • http://spainsale.pro/38722194755rm5h2.pdfIn PDF document text
    • https://kigimijufofudiv.weebly.com/uploads/1/3/5/9/135977026/622729580284.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://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_87883a5b73c14480963a332d21488ead.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_a91c4e4430444836bb821349e987aa3e.pdf?index=trueIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_fa9976236e3e42d68fd1245736d439f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9827b1ac-a2de-4b31-80c0-59489742514a/the_elephant_man_plot_synopsis.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/zozexumerunerusoxuni.pdfIn PDF document text
    • http://nitubak.atwebpages.com/ankle_dorsiflexion_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4942c19-f510-4dae-8080-a52035aeb254/23320138532.pdfIn PDF document text
    • http://zibelasavu.atwebpages.com/tejiwazuwuvat.pdfIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_2e5699c0765c49609c76534b5df85103.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_577df7dd59b94119857a7668b58049b6.pdf?index=trueIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_fe63397b532149e6851ba422a8abd062.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC42 2856 bytes
SHA-256: 67e529c0cc45a65b5f20541a3a8a0c7c949d18b2d9c842e8bbb1d3dc9e34a3ef
font_01_sfnt_off0001c666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C666 5272 bytes
SHA-256: 815f16ee496d60c54c5b71ffd4827dbcddc33c0b148f8a443dc853200bf7042b
font_02_sfnt_off0001d855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D855 12164 bytes
SHA-256: b50e5d052524825db7da7ab2c0bab2d62b239c0e3013de10a0314717e53ba18e
font_03_sfnt_off00020101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20101 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34