Malicious PDF — malware analysis report

Static analysis result for SHA-256 3001478b580dc348…

MALICIOUS

PDF

76.6 KB Created: 2021-01-14 06:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a2c91b607ce5bdee3274de61fd320b51 SHA-1: ed9c6e7cfdc1fc692f509339a8fed51f290664ea SHA-256: 3001478b580dc348b74b3cb56c5be84d86bca3f9d1e723cd230b9e3123fd93ac
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=direct+inverse+joint+variation+word+problems+worksheet In PDF document text
    • https://site-1168360.mozfiles.com/files/1168360/what_are_some_major_landforms_in_arizona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5fba7274dd896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fcf7e04e6b80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5ff3c1f9d2166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444646/normal_5fdbd3dd4d93c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fe5a21c21d89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_5fbb757c49dc9.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/4idPvvO/farm_line_art_images.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_5ff0cd7171a21.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/lawakux/baixar_super_bomberman_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/tokoten.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 5744 bytes
SHA-256: 81d9c5969562351ee3f110fb9ddf5e847877d51226de731c12824516d4b6ef8e
font_01_sfnt_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 11188 bytes
SHA-256: e37015ecdd7db19dbde6cca5240f22741a035e4bb66d76d2ef2e3f0c9ca2f983
font_02_sfnt_off00010ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 16192 bytes
SHA-256: 74a35dcac671789a1952909c7064e8f0092ccf84988030a41650584fa1b75142

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