Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eec923cec225f90…

MALICIOUS

PDF

98.7 KB Created: 2021-05-17 05:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7854bc414b2552fc7f6fae0669bcbfe7 SHA-1: 328e17b12c1f40d72ac7203ffde08a4126a6c6d3 SHA-256: 9eec923cec225f901c0f4b861cd22d0f4309d23299459065f102916582d8f8ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which are unknown and likely malicious, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple unknown URLs points towards a download or redirection scheme.

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 http://airbin.top/barbeque_chicken_pizza_toppingsu8n8z.pdf
    • https://cdn-cms.f-static.net/uploads/4489848/normal_603b24d5b28ea.pdf
    • https://cdn-cms.f-static.net/uploads/4381085/normal_60285d30c3ea8.pdf
    • http://noksipals.online/35264724454f6rin.pdf
    • https://moramiwise.weebly.com/uploads/1/3/4/7/134736235/biganusepugodigip.pdf
    • http://lnstagram-helping-centre.com/69344600641btu0f.pdf
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/buridibiloverexu.pdf
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fdd4923c61b7.pdf
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/somuga.pdf
    • http://lorewipa.scienceontheweb.net/breadboard_manual.pdf
    • http://wownatural.fun/sacred_gold_storm_silver_changesfoufu.pdf
    • http://sehq.xyz/athlean_x_chest_workout98ojw.pdf
    • http://xufelaketodo.getenjoyment.net/85914716617.pdf
    • http://janorewaxeno.mygamesonline.org/89946244848.pdf
    • http://nefritthebestthing.site/199038712159ad51.pdf
    • https://zazafiwizodizi.weebly.com/uploads/1/3/4/0/134041258/e9ad23ddd2fe9aa.pdf
    • https://cdn-cms.f-static.net/uploads/4424027/normal_6032fa61a079a.pdf
    • https://cdn-cms.f-static.net/uploads/4495694/normal_5fe6edd2f36af.pdf
    • http://varietystore.website/bcbs_of_az_appeal_form0aooc.pdf
    • http://8gusevshop.space/32142492498a7blf.pdf
    • https://kezugefoluvero.weebly.com/uploads/1/3/1/8/131856244/pimopululejilolareg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/WboozbXZlIE/wb?keyword=peer%20support%20group%20confidentiality%20agreement
    • 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_off00014796.bin
6cba13eafc1fb2d8408f408a057c4b4cca7f052a1db4a93cfb97f40624d651d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14796 5576 bytes
font_01_sfnt_off00015a8c.bin
711bf7eeadfa1aeefa6d20e14fa45a1fa0397c056d082bfd34c3bebce3d2eb86
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A8C 10256 bytes