Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e087e4d614f403…

MALICIOUS

PDF

81.9 KB Created: 2021-04-05 20:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8143a52e2b83f0c2e5e04b802ca8eb76 SHA-1: 15f576ba663ae352603f81f7d47e98f2637327c7 SHA-256: c9e087e4d614f40362a960df2dae99c4d8e98f9f5179e7fd6fab1f0c4ec8f21f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.7608

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.
  • 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
  • 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 http://vowavosudepomu.iblogger.org/54623172280.pdf In PDF document text
    • https://cdn.sqhk.co/jetobatu/mzgjjjR/twisted_tea_alcohol_content_vs_beer.pdfIn PDF document text
    • http://temonaga.22web.org/rapidex_english_speaking_course_book_in_marathi_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/gwvH6hj/37715917279.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/wvgcyPX/resident_portal_login_university_village.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/phb4fhd/battle_sound_effects_medieval.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/hRqieZP/baixar_sticker_studio_sticker_maker_para_whatsapp.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/SjchaER/80180565370.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/heThhop/25815057253.pdfIn PDF document text
    • https://cdn.sqhk.co/tinukomafiro/fhgfhVu/knighthood_meaning_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/kMuynZNWtA0/wb?keyword=streetcar%20named%20desire%20themes%20and%20motifsPDF link annotation
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_25efb0c02f0046b3a6cc034c40cd2d06.pdf?index=trueIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_285f185f9ad44fcd9034ceb984fb7cf0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfeeb807-7cf8-4f71-8b83-ba4afc37d1a7/what_does_c._mean_in_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78e20f5-2d88-46ba-b806-e3881adebe0a/69075664114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8419d0b-61db-4419-b0f5-215d9ed30de0/zadegowikerasore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced76d49-7b8a-406e-8be1-f33b12b5e8d8/86416689771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac4ddf0-75da-4a00-88af-0151d0f6756c/kamuvebeba.pdfIn PDF document text
    • http://sozogakuvigoxev.epizy.com/wd_my_cloud_pr2100_manual.pdfIn PDF document text
    • http://fegelefuxenitud.rf.gd/93303661448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91571d2d-b340-4840-86b3-28266de3f939/list_of_basic_grammar_topics.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_8973b288391c40c08f52094ac357fca5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cbc197-9872-4aa8-b8de-928d842f05f9/96377314362.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001329b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329B 5120 bytes
SHA-256: ced6f515fd6b390d665aea97e77d2a9adce7d19ad4a3abb3c7534c6394b359f3

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