Malicious PDF — malware analysis report

Static analysis result for SHA-256 384718bde89ded3f…

MALICIOUS

PDF

75.0 KB Created: 2021-02-07 04:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3440d26c2a1f4dc600345ba527deaf42 SHA-1: 50e057696d1476bd1cd90f815bc961fc30eae785 SHA-256: 384718bde89ded3f803147f702cf1a9590c76eb3e6f1b3682d82fca491c8e702
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDF files, suggesting a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though partially corrupted, suggests a lure related to 'leadership styles PDF'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://maypoin.ru/123?utm_term=los+estilos+de+liderazgo+pdf
    • https://cdn.sqhk.co/jivaduzar/9ifeghk/wezajaforovezoku.pdf
    • https://moraraxewurazi.weebly.com/uploads/1/3/4/0/134042425/kijajeledomox.pdf
    • https://cdn.sqhk.co/divojimo/hahbkgc/kendall_and_kylie_video_game.pdf
    • http://busivel.xyz/management_reporting_examplesd9h5i.pdf
    • http://wersita.space/63146729174igjj6.pdf
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/nudezew.pdf
    • http://roskycnmx.com/delonghi_coffee_machine_manual_magnifica2dg2d.pdf
    • https://cdn.sqhk.co/libuzewis/cjaqhi9/bubble_shooter_genies.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tukozadagafewan.rf.gd/endorsement_form_insurance.pdf
    • https://s3.amazonaws.com/mipeboro/jaxoje.pdf
    • https://s3.amazonaws.com/sixenogafopoj/95982960461.pdf
    • https://s3.amazonaws.com/juvosi/brainstorming_map.pdf
    • https://s3.amazonaws.com/saziwijaxodav/67698759662.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a2.bin
dcdd8ee3773d79e908898926ecd16b2e8a9bdcf32a70727f9813549ac694434b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 5200 bytes
font_01_sfnt_off0000f76d.bin
a44070513eb6836c948cc5a0c72a8530d975d270c9b4a12f7f0ec9b5689443dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF76D 11700 bytes