Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e7c4f3affde8b1…

MALICIOUS

PDF

76.1 KB Created: 2021-04-01 11:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bbd05b5daec274f74c49996a5aecdf11 SHA-1: 5543a81bd94b94c12f4db20500293dc8fdf09327 SHA-256: a1e7c4f3affde8b1eaf512759a069fcfc822338d4efa0ef6c2e91a0bdc9f6039
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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://yafferge.ru/award?keyword=ncert+biology+class+9+pdf+free+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4384310/normal_5fc8503c7d649.pdfIn PDF document text
    • http://relax35.ru/4141923874pl6jb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473954/normal_6043618f9d720.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/A1ZmgeI/linajatubemokosekomatox.pdfIn PDF document text
    • http://hookup754.fun/how_can_a_book_make_you_feel1cxtj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5ffe6bbe3a7e9.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/jjfgea4/tuvowamonifojigosuvosep.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/FVehbdE/the_maze_runner_original_book_cover.pdfIn PDF document text
    • http://souve.me/simply_keto_suzanne_ryan_ebook8wqtw.pdfIn PDF document text
    • http://stopnutristrike.ru/848563909792k62n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453100/normal_60082caae6798.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/154122519809ob7m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5fdf516b355e5.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/rewepalazamiso/82645657972.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/tazolaguxisenatum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db763ed7-9aa9-42d0-865d-ae8785a64240/rikazumejipedajafagimopeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce96277-94ad-445f-972e-077087ee4832/jojevafojukitikegad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe67d180-b82f-45ed-accd-89920170b237/kejozom.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/novejibewit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74312617-6b8c-4d8c-89d6-38242de719df/porque_hay_razas_humanas_diferentes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9e4b0f-34b0-436e-beb7-189f51a96d69/24631657788.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/bergeys_manual_of_bacteriology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fc63dd-ebf5-43c9-b888-aee801a23347/19753680871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87d0b8b-31e5-40e3-b780-2ece0b0d2b6e/petsafe_yardmax_cordless_in-ground_fence.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/andante_abba_sheet_music.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_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 5780 bytes
SHA-256: db2fe16cfa31a2db000913c7227251c4fbad0eb1a7f7f8319accbaf87c7166d3
font_01_sfnt_off0000feee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 10396 bytes
SHA-256: 7c4892a0a96eaf09bb9d57730d6d9229dd2c793217ec7089f01314dad2ce3735

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