Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec52d41b3ec2554a…

MALICIOUS

PDF

73.6 KB Created: 2020-11-14 18:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40ccffc5bb48abf4ced1a8940c0ad98 SHA-1: 11c12cbe4281d7c3c7a07e4cf4398f337ef524e5 SHA-256: ec52d41b3ec2554a014de103c4a619f1b67d40dbc00039795f4a520e6661ff02
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, with one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'music money and success' to entice users to click these links. The presence of numerous PDF links and a critical ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=music+money+and+success+pdf+download
    • https://pezujotage.weebly.com/uploads/1/3/4/3/134318684/e9b41ba077d52f.pdf
    • https://cdn-cms.f-static.net/uploads/4454547/normal_5fa8b277b4dae.pdf
    • https://norudajesopoz.weebly.com/uploads/1/3/4/3/134340776/6562279.pdf
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f8e0aa2632e4.pdf
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/mijasubipiginiwusimu.pdf
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/4efc0a4.pdf
    • https://cdn-cms.f-static.net/uploads/4408589/normal_5f9dd78aded7d.pdf
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f97136aeaa1f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vabemavuputenif/buwotoluvomaxunata.pdf
    • https://s3.amazonaws.com/nerugiraxura/marginsplot_varlist_not_allowed.pdf
    • https://s3.amazonaws.com/zirojopemup/nanusakumatumek.pdf
    • https://s3.amazonaws.com/senodiw/magic_photo_editor_backgrounds.pdf
    • https://s3.amazonaws.com/wekibik/answers_to_citizenship_questions.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_off0000e387.bin
c2ae43ee853a355be4f6191756882c0cafb6ac2994249d213f95f8ff72dfd445
pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 5404 bytes
font_01_sfnt_off0000f600.bin
e0c3f236ff616cf1831f16b1d8a41219ab700008b4184f6539215f71de33f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 10316 bytes