Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe52fb326cad0939…

MALICIOUS

PDF

80.6 KB Created: 2021-04-04 22:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87f5f9f59ec403d208c6547a1bb548e7 SHA-1: db091e9568ae5772f5f2f567f6b93eceae7f48b6 SHA-256: fe52fb326cad0939c63ac2cd2dfd8124f8240e0d6ad2d2fe852440cdef12e57e
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=alaska+tv+listings+guide PDF link annotation
    • http://juwijosij.iblogger.org/nojipiponawikikijan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_601243b989905.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/caUibsh/call_from_cartoon_cat_game_horror_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_60449455cac44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_600c37257b9ab.pdfIn PDF document text
    • http://copyright-notice-ig.com/ccna_security_chapter_1_exam_answersz53qz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_601856a940890.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/IO1nhje/mod_among_us_minecraft_pe.pdfIn PDF document text
    • http://amandeepsadyora.com/does_sodastream_contain_sugarabkqa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_60233a6ca9389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480732/normal_60591ba4cba0a.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/sjegjaS/73114713116.pdfIn PDF document text
    • http://contact-git.top/66460640130gfl8k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_6066ae4b8e7fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c9c88e-dbf3-43e1-98f0-0a4fdfbc0340/craftsman_trimmer_attachment_compatibility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e6abe00-2e32-4f9f-9ba6-6701d7d56213/banned_money_secrets_richard_dotts.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/xorabod.pdfIn PDF document text
    • http://dejogamolefip.rf.gd/corbett_maths_tree_diagrams_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c100dd9-082c-426e-afb6-499a1e51540b/super_smash_bros_ultimate_easy_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aab1195-3ea8-4b24-a968-60062d645172/samodinud.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_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 5008 bytes
SHA-256: 42ff232d69dffa0fda1ef362e67721419fd18ba7643e44b57431ecd597451d7c
font_01_sfnt_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 11456 bytes
SHA-256: 16adbc6720277205d29259ccc3adf4eee600d403b32a6c92ffeff54a7457f298

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