Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82e83c7aa60b6bf…

MALICIOUS

PDF

67.9 KB Created: 2020-11-17 01:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d0e1b542f938e480d8493e631705c2be SHA-1: 1ea9514f978fbba2f800b275b3510eeda26c9cf7 SHA-256: d82e83c7aa60b6bfd27a634977ed720d8a03f6b9cfd2129e9340a8d1c503811e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV and a machine learning classifier as malicious. The document body, though heavily obfuscated, contains text related to 'free download', suggesting a lure. The presence of an external URI heuristic further confirms the attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=alone+mp3+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5fa16f058e54d.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/fufokaguso.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/miledu/math_hd_wallpapers_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a12be5-ad76-4c36-88d4-323d4eb8bb79/zopilakujosamafusigopaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160378b9-4fe2-43e8-91bf-e89dd5ac58ed/89722438249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979206ec-037b-4e70-abd1-8ffa60fdbae4/2016_chevy_malibu_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/940c4d77-3b63-4f55-89ec-3c4767dbd77c/creme_de_menthe_brownies_with_hersheys_syrup.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/44870298382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb79e77-57c0-4759-9177-fec041beb46c/rajutefegadelefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9bc55d-4aeb-413b-9618-8255f6ad3039/xivuwewemofivi.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/21st_century_scholarship_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/nanuloputivupe.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_off0000ccbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 5252 bytes
SHA-256: ab75bd0553364f56d276707dbff69207e19365cd1c05a3b4d251bdb2fa77c3d7
font_01_sfnt_off0000de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 10584 bytes
SHA-256: 290f87a3506b1c7b75195f713ce9ae394905086038c242a0b75078e81c021246