Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56745733a4a962d…

MALICIOUS

PDF

84.8 KB Created: 2021-01-11 09:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2898d8be349bc03390159ffff1a1146f SHA-1: 6ba0ecaa0741da27a0c02fae8c66975231ec8ebd SHA-256: c56745733a4a962deb80f383a369bf27cbe6efe320b05ee0ace615cf7ea12187
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. The embedded URL suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffmen.ru/wb?keyword=troll%20face%20quest%20video%20memes%202 In PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/epic_games_rocket_league_not_launching.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/vixusuvul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490365/normal_5fe59c5dca508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fc53234c6b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5fb9642f4f327.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5fe18b67b7f4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501998/normal_5fede29f405fe.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/qghjjkP/donkey_laughing_sound_mp3.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/norozovijalu/arya_2_malayalam_movie_400mb.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/rimopabuzozuwugixos.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/zitesusezivuripe.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/59468671221.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/gallery_utility_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/ayushman_bima_yojana_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/tri_fold_brochure_template_free_ai.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA69 6588 bytes
SHA-256: c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285
font_01_sfnt_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 5432 bytes
SHA-256: 36bb9d86c20a138740ad252128fd94e378e109ba3483afa29aaeab14b852b4d8
font_02_sfnt_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 8320 bytes
SHA-256: eb7b3215a640dfde7d190d706210f0f5f0d14423999ab2a149ec25488c920665
font_03_sfnt_off000104b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 10344 bytes
SHA-256: 58045116cef34f8a99bbfeca82ef85c6366f959d9ab599a68773f56085d9c42e
font_04_sfnt_off00012828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12828 19368 bytes
SHA-256: 23dbbf98e7c55e65e9fcbce8e7ce454967d22a785b756d72bedcf40e886aad47

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