Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cddd978d2721110…

MALICIOUS

PDF

73.8 KB Created: 2021-04-03 03:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4e0f6314d642054a81dd1ef46905bbf SHA-1: b5809c3dd16a0fc73bf24f5651a1fe693f608ea7 SHA-256: 5cddd978d2721110d033ca03aded1f72b0a24249d4c1ccc682d8494fcac09e8f
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The PDF contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests malicious intent.

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://xezojetit.ru/wix?keyword=pyramid+of+numbers+and+biomass
    • http://weladorizifir.iblogger.org/51709721992.pdf
    • http://in-arenas.com/39287671725ln4oc.pdf
    • http://top-odejda.com/gutuwhpp4m.pdf
    • https://cdn.sqhk.co/xovepejegosi/9Gr8jhd/match_attax_bundesliga_20_21_adventskalender.pdf
    • https://cdn.sqhk.co/nurijodefa/hiiigku/19332135098.pdf
    • https://cdn-cms.f-static.net/uploads/4414871/normal_6056d6f170aac.pdf
    • http://sewukagazub.mypressonline.com/curso_de_gestao_e_administracao_de_empresas.pdf
    • http://lnstagramverifiedbadgeservice.com/secret_sister_formsburr6.pdf
    • https://cdn-cms.f-static.net/uploads/4383149/normal_604a80f726d8b.pdf
    • http://vudifabofugejij.medianewsonline.com/hegemonya_ve_sosyalist_strateji.pdf
    • https://cdn.sqhk.co/vuvesanap/Zjdghid/24379812529.pdf
    • https://cdn-cms.f-static.net/uploads/4470016/normal_6013eb7ddb472.pdf
    • https://cdn.sqhk.co/zesonixiv/igjfQjc/86171488760.pdf
    • https://cdn.sqhk.co/vujenibolo/jVidmib/zazobotiwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pavujiniz/merifipuxev.pdf
    • http://kolofagigetu.epizy.com/sogebon.pdf
    • http://bopewexe.onlinewebshop.net/luwawemapi.pdf
    • http://pirefalanife.epizy.com/sujaxepojixewijekanipi.pdf
    • http://farovosodiwes.atwebpages.com/difference_between_ip_camera_and_analog_camera.pdf
    • https://s3.amazonaws.com/gonima/zedemi.pdf
    • http://soranodabiwegi.myartsonline.com/ansi_c_89.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_off0000e336.bin
7c4e8961c670e019ace7ab601b60378c7349188b99d7bcaa074d089cf2e3dd9e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE336 5264 bytes
font_01_sfnt_off0000f50e.bin
4fdd7a8bf2075b7c25c554ae44f03b106259cdbf02ec8f45da90668e0139de26
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 10864 bytes