Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44364e727b98eb8…

MALICIOUS

PDF

47.9 KB Created: 2020-11-02 12:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 92a32871fe8129588038476badd8a1a4 SHA-1: 9867b11849c5c67c5d335448134048b4996ed5bf SHA-256: e44364e727b98eb89c37b5cf6c3d8ce8f0d4399c8eef60e46bd3cb3c8b4cf3b9
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/strik?keyword=holt+physics+solution+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f8ea252ed2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f882256879fb.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/f23f8b9c191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_5f9f38f084854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f994c65afad3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/vofudoluz.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/experian_credit_report_change_detected_email.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/vatudenusupuxapuvejij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4394/4126/files/54679404435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1670/5950/files/mammographic_imaging_a_practical_guide_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e64ba19-3d15-40ee-bb14-86a6a765c8c6/zosatixozugapobes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9570/6782/files/duwufipajubosusof.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/castle_nut_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bad02fa-6178-4412-a400-0493624fd043/53283793991.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_off0000673e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673E 5364 bytes
SHA-256: 3a1877f90ab105c065094fd433dc85d11e71228ae3db03497494c51cf2842d7d
font_01_sfnt_off0000795f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795F 10412 bytes
SHA-256: ae78fab8e0e0639b851368120c5355f146a74571f1e99c2cc049690309c7b5a5
font_02_sfnt_off00009d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D21 16344 bytes
SHA-256: dc620336aa769c766927a552749f6283a30952bf3238451f386faf844582b0a6

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