Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b69d5a94e18e400…

MALICIOUS

PDF

70.7 KB Created: 2021-02-05 04:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 463733aaeb3cc6f381593a6c12daab0d SHA-1: 29924848c0c5f763af2587ce19389764a026bb26 SHA-256: 1b69d5a94e18e400dddee2d8066495fab2928c9998ae0de73c8adfe36cb56b61
224 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Trusteer rapport mac', likely a pretext to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://yafferge.ru/wb?keyword=trusteer%20rapport%20%20mac In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486535/normal_5ff65016bcacc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391903/normal_5fc9ac6b8d5bc.pdfIn PDF document text
    • http://mitipevebedo.iblogger.org/duxivivotekinimivu.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/7o752jd/59435804690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_6013e47e8d186.pdfIn PDF document text
    • http://korsabarca.com/metatgsoe3.pdfIn PDF document text
    • http://prodson.fun/pepsi_mission_statement_best_coke3e4gg.pdfIn PDF document text
    • http://megalit-korolev.ru/8309364000jbtz0.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/YhjPBji/nusajazu.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/xoBsYhf/20608495147.pdfIn PDF document text
    • https://cdn.sqhk.co/likamigid/hbhjDXz/pioneer_in_arcade_games_and_home_computer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jusudab.epizy.com/maa_durga_ka_bhakti_gana.pdfIn PDF document text
    • http://kurejaj.epizy.com/book_opening_animation_template.pdfIn PDF document text
    • http://gosovugan.epizy.com/21763875632.pdfIn PDF document text
    • http://lojokedasu.rf.gd/boss_260_performance_parts.pdfIn PDF document text
    • http://kabexumowexugu.epizy.com/74523843002.pdfIn PDF document text
    • http://dezoruxeg.epizy.com/sajasitewosojaxujobufu.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_off0000d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 4996 bytes
SHA-256: cc55d94594e13c09d23c8f896a4807e7178a144c4f06df64298cf65658060ab5
font_01_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 10388 bytes
SHA-256: d4e7bb4fa8bcce376f0ea06ff874c804db89429c12c84a1158c0deb5959b8528

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