Malicious PDF — malware analysis report

Static analysis result for SHA-256 30107842ec794e74…

MALICIOUS

PDF

77.3 KB Created: 2021-02-11 14:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7b9e57dbd4f0857ae7c7298f6dfe20cf SHA-1: 2e6c1e6fafc0ed343a5663f44b9e8e861b4e5854 SHA-256: 30107842ec794e74870a584c9d8af8cbfd72703203c0d2428c36b8d54d6b57d2
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is associated with a phishing lure related to a giveaway. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=wish+app+daily+giveaway PDF link annotation
    • https://cdn.sqhk.co/kavejufa/Vhjhejg/crossword_clues_in_brackets.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/e0haww8/75264551054.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/Sjgfjin/mowimavawuzigudizigu.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/hmifwjb/likijoxelenuranavavemok.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/mpHbkjg/slide_away_live_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/CiJ0ohf/25955634528.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxunoromi/A27xjfd/best_pop_songs_2020_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jbjezmC/7418692015.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/uGjcDja/bullet_force_multiplayer_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/Vhbzygf/shooting_world_gun_fire_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gepaxulunan/fhiilic/construction_project_management_jobs_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/sToggjg/fudunowafopenefovis.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/hnHgiva/bts_dynamite_lyrics_mp4_download.pdfIn PDF document text
    • http://bamasadukarudam.iblogger.org/uji_non_parametrik_mann_whitney.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/pvibih7/lesson_plan_format_for_teachers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xagewozutuke.epizy.com/21192309061.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 5392 bytes
SHA-256: c5d2ecb1a539c0d9491cefaad895d126a11ae48fc32ee46a3e8e2d518f8395b3
font_01_sfnt_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 3672 bytes
SHA-256: cffdbdbb3ab7df0b83ac0edfe77c23d5193cfae3ead049a2afc86ff31be9a21b
font_02_sfnt_off0000e94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 12996 bytes
SHA-256: 139962d267e41b7a90a0ba33c90a4fcb4f3dc1ea7281530cb923e0f70b5b12bd
font_03_sfnt_off000112a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A1 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8

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