Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5216e0a4f564eb2…

MALICIOUS

PDF

82.8 KB Created: 2021-03-23 01:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92de6ac4759ec023c51c0352577c11d4 SHA-1: 524ec2e8978d2610e785915f43fefdddcddc2de5 SHA-256: d5216e0a4f564eb2d21a8086100f494a9dd3747d3949f0b24ba8d4a41ce88ec8
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to a suspicious domain, likely serving as a lure or a distribution point for a phishing or malware campaign. The document body, though heavily obfuscated, contains strings related to a Samsung soundbar, suggesting a pretext for the malicious link.

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 https://ponafet.ru/strik?utm_term=samsung+hw+f550+soundbar
    • https://cdn-cms.f-static.net/uploads/4390995/normal_6012cecc035a6.pdf
    • https://cdn.sqhk.co/banamasuvaj/VVNgjhi/easy_granny_square_pattern_diagram.pdf
    • https://cdn.sqhk.co/gixedomawa/ejcijUy/gradient_of_a_line_questions_and_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4408190/normal_5fcde29e89c32.pdf
    • http://helplnstagramcontact6088757.com/ketogenic_diet_definitionrf0cd.pdf
    • https://cdn.sqhk.co/torazanopuni/hijijhs/60590895164.pdf
    • https://static.s123-cdn-static.com/uploads/4453909/normal_5ffcc90d793e6.pdf
    • https://cdn.sqhk.co/lojulifuvuxu/9hCpQje/40591261424.pdf
    • https://cdn.sqhk.co/pijovowifil/rhe9ijp/skins_movie_2017_rotten_tomatoes.pdf
    • https://cdn-cms.f-static.net/uploads/4403260/normal_60176dd88d943.pdf
    • http://solapp.xyz/gepodedza7mr.pdf
    • https://cdn.sqhk.co/bizifabov/dpicXjd/npr_mueller_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e19829eb-50d6-4fb0-9c80-d48519e718c6/what_is_cpt_modifier_kx.pdf
    • https://uploads.strikinglycdn.com/files/68c0ec0d-9d0c-4d5d-af99-4287e144099f/xixuto.pdf
    • https://s3.amazonaws.com/makumapikeze/hexatech_vpn_free.pdf
    • https://s3.amazonaws.com/ziwuvijevo/64068868279.pdf
    • https://s3.amazonaws.com/vibuvomomuv/safativemi.pdf
    • https://uploads.strikinglycdn.com/files/e49e2535-6a3f-41f0-8954-0fd67a82f761/zigarebese.pdf
    • https://s3.amazonaws.com/pajukovuxetu/jaxukobes.pdf
    • https://s3.amazonaws.com/matogapibelifiv/37326936757.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_off00010524.bin
bae8a9a695afae28646ccdf1ae0c2ad12cf351d6fb9118c8d14b4ecee957e9af
pdf-font-stream PDF embedded font (sfnt) at offset 0x10524 5892 bytes
font_01_sfnt_off00011917.bin
ca65002651d29379d9677eb54c1e268f46dec8b22d214b5a923ff05aa053d975
pdf-font-stream PDF embedded font (sfnt) at offset 0x11917 10844 bytes