Malicious PDF — malware analysis report

Static analysis result for SHA-256 71faab9af8e227cc…

MALICIOUS

PDF

73.0 KB Created: 2021-03-28 18:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63e1a391f830a4f56e586d313766d0b3 SHA-1: dd43c09bb2c2f47bedd3d594b4a6d3ffa0f6474a SHA-256: 71faab9af8e227cc37cf870564a7a65b69ecdc8679fe6a72187c7fc00e8c726c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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
  • 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://xezojetit.ru/wix?keyword=dana+wood+rate+my+professor PDF link annotation
    • http://bezigex.iblogger.org/my_heart_and_other_black_holes_book_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/a8ejdjf/zufipa.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/kaplan_vs_princeton_review_mcat_prep_books.pdfIn PDF document text
    • https://cdn.sqhk.co/nexapebevux/dYAjiP0/update_huawei_p8_android_7.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/gAjbSjb/impossible_water_bottle_flip_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_60467ff086c96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489583/normal_5fe3c7036805c.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/a93aAdF/zombie_gun_game_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_604ca9dd00c29.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/dgfhbhi/virtua_tennis_challenge_mod_apk_1._3._0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_6025ef395ffb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_9c8a2b32e6364616a197e1b423110ea5.pdf?index=trueIn PDF document text
    • http://weralawubuzeg.epizy.com/cdca_endo_manual.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_68382dd951da462396f9e7e58ec26aeb.pdf?index=trueIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_4ac46e0f87dc4c3ca05fa9c8db7d3858.pdf?index=trueIn PDF document text
    • http://toduwez.epizy.com/family_coloring_worksheet_for_kindergarten.pdfIn PDF document text
    • http://totofexux.epizy.com/atoms_ions_and_isotopes_worksheet.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/xexesibedavuli.pdfIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_f6771a1cd77d434c85efcc58c575daae.pdf?index=trueIn PDF document text
    • http://fuluxewamotate.atwebpages.com/64672427647.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_off0000e03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03B 5348 bytes
SHA-256: 2812dd204750b36d331d455d29e8487e0c55ab2522e2ea4c03a64ea59d651b67
font_01_sfnt_off0000f274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 10636 bytes
SHA-256: 361bb6dd92a4f64adc1ba261107f1500e2bde36dd84766887ba86c2892e4930e

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