Malicious PDF — malware analysis report

Static analysis result for SHA-256 40891387de4afd0f…

MALICIOUS

PDF

79.2 KB Created: 2020-12-07 02:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9eced70667e6bae979267a7529a84d5a SHA-1: d65eb4e0bf09360e967c627dbd7d02e7c2d6b9e2 SHA-256: 40891387de4afd0f4dda87fdd913ee1457618780ec840ef30eab8eacd9ba56da
96 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 ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?utm_term=shawshank+redemption+online+youtube PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474719/normal_5fc5497ca104e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5fbff8f6aee19.pdfIn PDF document text
    • https://kawifapexevudo.weebly.com/uploads/1/3/4/7/134711131/d2ec698d4541.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/zodawanuror/minecraft_apk_download_softonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdbf28b-98a5-4eb4-bef5-7a3214ba7886/folilewewuxituratekag.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/96684457091.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/loxezijasusif.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/bativowil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54387e86-ae21-4ee1-8fbf-4251d31bd84d/bridge_of_clay_number_of_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/chordata_book_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 6552 bytes
SHA-256: 6f9604fd2973ca8e08c976ff948b67f9809b7c50317427bb09e0742de29e26dd
font_01_sfnt_off0000ddc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 5700 bytes
SHA-256: 4d904eaa579ab55836c70da69028c402ddbc58473a2415298df29c3f65bdc1bc
font_02_sfnt_off0000f10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 10392 bytes
SHA-256: 7ab45965f203a36ade3a02eee5bc6d8334d996bfde737e578278a4e19f6daa86
font_03_sfnt_off00011499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11499 17216 bytes
SHA-256: 37d585093bd787fa37b4e78ad380f4645fbedcfdf746ed916965b68aa0ddab52

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