Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef984e8f216dcc6…

MALICIOUS

PDF

70.9 KB Created: 2020-12-17 07:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 26252c7817d32c5d05dd482b344ce36c SHA-1: 76afae0e9351179a90c377aa89035bd4367d37bb SHA-256: eef984e8f216dcc672533d867288156722cbad7eba7b889748b1b6fe686cee30
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=why+did+the+renaissance+began+in+italy+give+two+reasons'. Another heuristic flags it as a PDF link farm. ClamAV also detected it as Pdf.Phishing.Trojan. The presence of numerous links suggests an attempt to direct users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=why+did+the+renaissance+began+in+italy+give+two+reasons In PDF document text
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/muloriju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5f907ec45ecc6.pdfIn PDF document text
    • https://fijozemubo.weebly.com/uploads/1/3/4/2/134234573/dogiken.pdfIn PDF document text
    • https://kowawixuru.weebly.com/uploads/1/3/4/5/134509215/tobigimopuboradiwopu.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/rebesudanolo/tabela_de_capacitores_smd.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/download_take_care_of_you_by_adina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52962bdb33045eedddf3c/t/5fc692624e98326c02f7b4f5/1606849124228/kifetid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1641b6b97992eb55f7d52/t/5fc7c16993ad1a4812289125/1606926702224/city_racing_3d_free_download_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2ab1d0f3a8752c5098c6/t/5fd63d0c89566e781f4a1ee1/1607875854332/letter_of_employment_acceptance_template.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/esl_sentence_structure_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/brick_kiln_plus_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0daa2c45-ebcb-435b-996a-55cd0d63aaac/50594656444.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 5608 bytes
SHA-256: 87171cdaaab9b6a56db5077517e2fe4dfe950bcf605365ca5a57c0a84e2a3b9f
font_01_sfnt_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 11828 bytes
SHA-256: 6435b41289bfb4c663f30bde085d3a522bd5fbf39a80830191ca29a212dbf5bf

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