Malicious PDF — malware analysis report

Static analysis result for SHA-256 160436639601e8d7…

MALICIOUS

PDF

266.0 KB Created: 2021-01-09 17:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 852ef34ead7b88f7e38d503b0df52e20 SHA-1: 2e2b5267c06dfc6c6ab8aa2d3b61e4ebd07cc322 SHA-256: 160436639601e8d77cc04a16f22c829a43fd81d03d3b00bf906fdd99db26c81d
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, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were extracted, the presence of a malicious URL is a high-priority indicator for a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9758

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/123?utm_term=4+principle+beliefs+of+christianity In PDF document text
    • https://cdn.sqhk.co/xidujefonari/ayjbjiJ/24821671088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f8f60e0579b4.pdfIn PDF document text
    • https://cdn.sqhk.co/podizapexiv/he5ibAl/7765436975.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/xXbghie/bgn_launcher_premium.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/jjTgcj7/vawabudivafiduwuvagisowu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5fe0a44a46bf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f8c051f7c8b9.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ighgdN7/free_online_games_for_pc_and_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/iahihhL/62477952479.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/fXbITjh/xeterikipaduxukusu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0972be-4747-4a4f-a56d-330914d29d61/valikibaredi.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/gesazobafivevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/937cab2c-cd79-4f5e-a7fb-ebe0a4b184e7/download_the_chronicles_of_narnia_prince_caspian_dual_audio_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8f88a6-f5c0-4050-b678-67dbfa97c689/nintendo_ds_emulator_android_apk.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_off0003a4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A4F4 5164 bytes
SHA-256: 8c90c9391769c0eb7a01a1381ca23bb945c10cf3eef0da48b0e3370b9854d5db
font_01_sfnt_off0003b709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B709 5340 bytes
SHA-256: b51c8fe51b6174fa5a8d6282b447b217c061463e3f7c781bbc0ad42c0a778285
font_02_sfnt_off0003c932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C932 21544 bytes
SHA-256: 37718ba907ab72306f1d1d1512547c46cf8aec657508b7d24b39a50d3614a382
font_03_sfnt_off0004037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4037D 16076 bytes
SHA-256: d79f8630c379324a8adf2ace1ac13854873a4a312a92cebc5b57330f95112618

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