Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e48b949e74faa6…

MALICIOUS

PDF

72.7 KB Created: 2021-02-11 23:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aae9a72239e8c068813e631a9ed5f2d2 SHA-1: 5d2e78c97d1c73627474cbcfcf066616177d2709 SHA-256: e5e48b949e74faa65d96bd9827ddb86ce2489009b7755b0aaed7394c1d327d95
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely to redirect users to malicious sites. The presence of obfuscated document body text and numerous external URIs points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=epic+war+3+cave+of+trial+5 PDF link annotation
    • https://cdn.sqhk.co/kuderoxuz/UDjg0iw/dobiku.pdfIn PDF document text
    • http://prequester.online/bully_apk_rexdl92rr8.pdfIn PDF document text
    • http://damvglaz1.xyz/charles_j_kubicki_for_judgey3rzv.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/cbifjdM/talking_ginger_eyes.pdfIn PDF document text
    • http://tersq.space/cinemark_brasilia_ingressoumqpj.pdfIn PDF document text
    • http://abouts.space/the_managers_path_free_download2ivft.pdfIn PDF document text
    • http://discout.online/jetech_2.4g_wireless_keyboard_manual1ewcg.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/jjhbY4I/terraforming_mars_prelude_expansion_buy.pdfIn PDF document text
    • http://miravozexafoxiw.iblogger.org/dodijuguwatuvixas.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/cgeihHH/command_and_colors_the_great_war_ios_review.pdfIn PDF document text
    • http://axecheat5.xyz/american_english_file_1_descargar_gratisjalel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xesidif.epizy.com/rudram_namakam_chamakam_in_sanskrit.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/wemodinepewebivewuwex.pdfIn PDF document text
    • http://budunasetixap.epizy.com/saaho_bang_bang_song_mp4.pdfIn PDF document text
    • http://vigijig.rf.gd/propiedades_medicinales_del_aguacate.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB4 5228 bytes
SHA-256: 3773420095fbb4c49b3303499b1f10ce8e022745a24787a15e9b06faf709d1fa
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 11356 bytes
SHA-256: a0ac961c6452b50aedd93c862851943b882a9935754d6d24f39b55b397476213

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