Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2164f633eb1b00e…

MALICIOUS

PDF

72.7 KB Created: 2021-02-14 00:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dc7f47dfa691667084e702ababd7339a SHA-1: 6b976a81acdc60412dd818522f2aa6e487001ade SHA-256: d2164f633eb1b00ec8059b7b817005ed1317b86c4a180c7ea6761b598b7d1890
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains text related to sheet music, suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=christmas+song+medley+piano+sheet+music+pdf PDF link annotation
    • http://kanshoper.site/xidojesapotta3h.pdfIn PDF document text
    • http://drnextact.xyz/aquasource_bathroom_faucet_parts_diagramgyhyu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382782/normal_5fe58e3391d23.pdfIn PDF document text
    • http://opticsystem.website/dungeon_defenders_2_guide_2019tmbza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5ffc859b38a3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5ffd6e4c294b8.pdfIn PDF document text
    • http://zumbayuliya.online/mepaziwozonagebasupebajdiz1h.pdfIn PDF document text
    • http://fitit.space/arcade1up_pinball_uk9h34n.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/xopugup/solubility_equilibrium_practice_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/gizavejib.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/chopin_nocturne_9_no_1_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/55624262091.pdfIn PDF document text
    • http://kepinud.rf.gd/ctfa_cosmetic_microbiology_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD84 3844 bytes
SHA-256: debc3e668e367487d0f8025834f9189a57b811f0b6457ce65cdf91deced55477
font_01_sfnt_off0000db2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 5576 bytes
SHA-256: 3f2451da81fe861ab5b13af2cd73f72b500816776b6db921c654de97f67b7eef
font_02_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 11480 bytes
SHA-256: 3a9a2207150836a38476376af6f0b47c750ecd9bc519adbb3d100f4aea324a59

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