Malicious PDF — malware analysis report

Static analysis result for SHA-256 6773e35a50f91216…

MALICIOUS

PDF

76.6 KB Created: 2021-03-20 07:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ebdf456a7ca0d0addeb864f70b096e0 SHA-1: 95be47d0241d0d5f985cd19cedf8b3e9c100d892 SHA-256: 6773e35a50f91216445ea9cfdd9b4c6e6f5d480ddebc8c97df5eb101c356556b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords that suggest it is masquerading as a search result or document, further supporting a phishing or social engineering attack pattern.

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
  • 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://pelibifir.ru/wix?keyword=nutuk+pdf+english
    • http://sesizuxewewax.mygamesonline.org/temenewimumuk.pdf
    • http://ttop-shop.com/wurupesazubryqhp.pdf
    • http://wabaxifejem.sportsontheweb.net/melosiku.pdf
    • http://caterm.ru/troy_bilt_horse_cultivator_attachmentqh0h9.pdf
    • http://kigirifaduguv.getenjoyment.net/an_actor_prepares_by_constantin_stanislavski_free_download.pdf
    • http://kenugizi.getenjoyment.net/99_topics_ccfp.pdf
    • http://jobs-ingenieur.best/defokozwdg1u.pdf
    • http://natnat.fun/foketamowiwi5sqeu.pdf
    • http://polikarmonolit.ru/jujofazegosiborfjqi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xedemigu.atwebpages.com/tratamiento_nutricional_para_anorexia_nerviosa.pdf
    • https://uploads.strikinglycdn.com/files/1186fa65-fa73-43d6-bce1-957abc270957/fetixibafisitoti.pdf
    • https://s3.amazonaws.com/limewub/triangle_angle_bisector_theorem_worksheet_answers.pdf
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_5b3b2d51e67840c6aa31138d0b204e79.pdf?index=true
    • https://s3.amazonaws.com/xukonakefules/intelligent_design_novelty_printed_sheet_set.pdf
    • http://pikaderobiw.atwebpages.com/fujitsu_halcyon_blinking_10_times.pdf
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_16e3f92644f94786b29a193fbff87a1f.pdf?index=true
    • https://b3df6b87-ca8d-4c26-b815-8c697753997b.filesusr.com/ugd/896a32_0728de6f0d84422d987bf64eb4556114.pdf?index=true
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_152db4b50b3e4a838c08fe9c0b8cab09.pdf?index=true
    • https://s3.amazonaws.com/kukupunopedon/autocad_2014_xforce_keygen_32bits_free.pdf
    • https://s3.amazonaws.com/penale/gajofofotolugim.pdf
    • http://rujidafedisezu.atwebpages.com/how_to_turn_a_into_a_jpeg.pdf
    • https://uploads.strikinglycdn.com/files/b34bf020-d56e-434f-9b6c-ba8d6c23f433/how_do_lincoln_logs_work.pdf
    • https://s3.amazonaws.com/wujixus/15340584875.pdf
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_c4501bc5b5544459a08f8068f533d956.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee55.bin
2c17711f1eb8d6a494cdd88af8a8ccd34dcb22903c9da9b65e399c23775ff34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 5032 bytes
font_01_sfnt_off0000ff85.bin
e95ef1a88b37713b1765598fca09ad359b9d0bfe60195a1d4e7caca9d78daa89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 11128 bytes

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