Malicious PDF — malware analysis report

Static analysis result for SHA-256 5536d9ee27455198…

MALICIOUS

PDF

91.6 KB Created: 2021-01-21 03:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c1614f92a027b559f9f6d82c90375edb SHA-1: d5680b230702e07c8eefa24da00a2b9880bce4b9 SHA-256: 5536d9ee27455198c76e1c542cfd606d415fe29705ca898724065698f3503610
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a site offering 'atomic structure practice answers', a common lure for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=atomic+structure+practice+answers PDF link annotation
    • https://cdn.sqhk.co/vovewotutal/KidhiT5/wii_u_emulator_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/BihuLuR/97754661857.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/07iQOIJ/5627876994.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/hhbihHw/zamuvobolikanobatow.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/jejhhhz/mad_zombies_offline_shooting_games_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dagedazi/1V3jgje/32742111283.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ihhm4LM/60583333232.pdfIn PDF document text
    • https://site-1178037.mozfiles.com/files/1178037/download_game_football_manager_3d_offline_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/FoFHuih/73768120376.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/VPtT2n0/adamantite_armor_terraria.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/mubefula/carried_interest_loophole_tax_reform.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/10508915822.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/21874517391.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/bates_motel_2013_full_movie_free.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001351e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1351E 25616 bytes
SHA-256: a7d377010ce819f540235bc24e935f3943cbf0217af78d377f50124569f4ff4d
font_00_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 5128 bytes
SHA-256: 314db12618254b238dd5449ed6e53beda598c59325871c31356660ec0c32bf5a
font_01_sfnt_off00010d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D24 11672 bytes
SHA-256: 7c7c7dbc6a2dc26585769a8273b9cb5e67132192ce7922c4462ec1d7a448f46e

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