Malicious PDF — malware analysis report

Static analysis result for SHA-256 4488301959f7768e…

MALICIOUS

PDF

83.0 KB Created: 2021-01-10 18:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b26a4a33f66035906181f7a460f7e96 SHA-1: 9cf31820f88f07d98f01b8afe472b607424b785a SHA-256: 4488301959f7768edc4ccf9f7df3c878da08e5c291eb8addd609331ef3a24f6e
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a link to a known malicious redirector, 'ggtraff.ru', and displays a fake CAPTCHA to deceive users. The presence of a malicious redirector suggests an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://ggtraff.ru/aws?utm_term=google+groups+login+form
    • https://site-1213938.mozfiles.com/files/1213938/subcontractor_agreement_forms_for_contractors.pdf
    • https://site-1175580.mozfiles.com/files/1175580/comic_world_dubuque.pdf
    • https://cdn.sqhk.co/pubodegosog/ZicjaXp/my_chicken_virtual_pet_game_mod_apk.pdf
    • https://site-1168006.mozfiles.com/files/1168006/push_box_level_2_solution.pdf
    • https://site-1168029.mozfiles.com/files/1168029/pic_a_part_las_vegas_inventory.pdf
    • https://site-1178226.mozfiles.com/files/1178226/xilipodefidowevufawapak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gezetega/thanksgiving_math_worksheets_first_grade.pdf
    • https://s3.amazonaws.com/regufojalojaza/3d_wallpaper_iphone.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/catalyst_english_book_guide.pdf
    • https://s3.amazonaws.com/zoromexemuzid/2_aankhen_12_hath_full_movie.pdf
    • https://s3.amazonaws.com/gosete/baldomero_lillo_cuentos.pdf
    • https://s3.amazonaws.com/tojazudibumogab/calibre_ebook_reader_for_windows_7.pdf
    • https://s3.amazonaws.com/lebejos/46904500307.pdf
    • https://s3.amazonaws.com/xidulumexi/a_kingdom_strange.pdf
    • http://groups.google.com/group/ORA-google-group
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb32.bin
306dc224fcc4faf7a0e24c19f1a9704da54a1848b62d5be498d30fb20657fdd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 4844 bytes
font_01_sfnt_off00010b97.bin
9341c091cfde1607337ff7c5cfd7736d0a5930736b1d968e7803e854088cbfac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B97 10976 bytes
font_02_sfnt_off000130a0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130A0 4324 bytes

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