Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cee258419c9ae8f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 00:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0104ea39e37c27e78bd681572d549977 SHA-1: 53df55235a507c6087983d415cc96bf91d47317a SHA-256: 2cee258419c9ae8fa3cbf023c0062a16c978f07ded3b7c92696993276f88072b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • 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.
  • 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://jottigo.ru/award?keyword=arariba+plus+matematica+8+ano+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383698/normal_5fdf4a2503872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_605520c12c7b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_6032fb9a09409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5ff65175bcc9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_6010fb19294a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legenapi/86673894411.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_18ab510cc60d443c980986f087d050f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/9369138495.pdfIn PDF document text
    • https://591379ed-26d0-4405-baa7-5b8dadede013.filesusr.com/ugd/866ffa_67e5fae321a94976935580a324d7f487.pdf?index=trueIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_816e2e6d0ab8438ab3fb18334e77da54.pdf?index=trueIn PDF document text
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_fa38c16062c34cf18a7c8013f1f56a3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nevowimo/taxuxudigitijuboput.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/science_fiction_writing_template.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/kolotabitaxoko.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/darkness_visible_william_styron.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_6c4c076cabef4e8d9cf2f630d7b532ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ratixifo/definition_of_balance_sheet_statement.pdfIn PDF document text
    • http://rezofegiwuw.rf.gd/toned.pdfIn PDF document text
    • http://xegunapajom.epizy.com/35595400225.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/tamuwosukudaxuna.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/46214580008.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/food_safety_manager_certification_quizlet.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://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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE838 5624 bytes
SHA-256: 0f5679a7480de4f82e2a83716840c356444eb5f378ace522f70e53ace6d85d61
font_01_sfnt_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 13856 bytes
SHA-256: b6e7e3b117fc0725cc631db9eecb8334f38a44ed22828aab1f4c55833184e328

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