Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4e3b076ef4cd1d…

MALICIOUS

PDF

70.2 KB Created: 2020-11-24 06:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cd9354fe7d0f53399e753cc34215bbfd SHA-1: 219a5f37e0ffe7cec74474792170611bef9b075f SHA-256: 4c4e3b076ef4cd1d7ebcd82a1bdfaa6e920231a552718fdd0501c6bbbfaa2f3c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://trafftec.ru/strik?utm_term=dieta+de+1200+calorias+del+doctor+nowzaradan%253D, is likely part of a phishing or scam campaign. Although no scripts were extracted, the document's structure and the presence of an external URI suggest it is designed to redirect users to a potentially harmful site, possibly for credential harvesting or malware delivery.

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/strik?utm_term=dieta+de+1200+calorias+del+doctor+nowzaradan%253D PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/947d7b53-4a50-4880-99f3-b9a2765c0efc/68725868472.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/34395099591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23102b49-85df-4ab1-9c9a-ab5347c8e195/ck_12_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416c8f1f-27ec-4e05-a79a-ea2c84ffafbc/matematik_olimpiyatlar_soru_ve_z.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69f3b3c-f897-4634-8743-ffc446350328/12258425589.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/dagus.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/lajutol.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/72036870130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943d3718-a5a0-4453-a321-2cd214de6543/82863409071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42d3797-ef05-41ae-a610-3147d60fe57d/community_tech_tree_ksp.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/kelogix.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/jackson_high_school_football_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7c4ce7-9194-4428-b17b-3f84c4bd2f49/uc_davis_political_science.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_off0000d116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD116 5448 bytes
SHA-256: ff54485422fe6ba55475a2c4321db2ab66c818bbe965b72dd97859ea49dbef1d
font_01_sfnt_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 12084 bytes
SHA-256: f7641911dc75610661615da755802cc700c6b4d853d69a883aab9947073d0c07

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