Malicious PDF — malware analysis report

Static analysis result for SHA-256 edff2798ed7f7ca9…

MALICIOUS

PDF

90.2 KB Created: 2020-11-11 01:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1a16dbda9e51cbfe6cb60c2950578143 SHA-1: 047c26d3c2b8fc1d02a14f42ba5144d070fb70df SHA-256: edff2798ed7f7ca90184f02ee7b4c8b145fd3825099082b2ed5d8868cd4658f4
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 0.9997

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://trafftec.ru/123?keyword=linksys+ea7400+router+manual+setup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5faad5688c590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f88d0bf99d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f8a2b74a8785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_5f941c9156f55.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/b9a2e7ab-4150-4a90-afc3-645a4856cf7b/pifakize.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/mitexazarulonewulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b931ad8-b384-43d4-8d7a-44f0763845aa/38028021803.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/streets_of_rage_2_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a37b98-9c81-4b90-add1-510cd0e0fbfb/42972842838.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/novolibuwawukim.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/again_meaning_in_bangla.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001240a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240A 5380 bytes
SHA-256: ebcc3d2b59a60bd1a873f8879f09b787fa8b2f4ff7fe63791d8ab26de59b83e6
font_01_sfnt_off0001365b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365B 11220 bytes
SHA-256: 3ccee22129619e0656b08cf5c7abcedb18d82fb354e6df6eccf400d4c0c31fbf

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