Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66dd9a119e71e5c…

MALICIOUS

PDF

73.8 KB Created: 2021-03-08 15:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 165729e77f6a437edd622ee2b11c410a SHA-1: 416503651f5074ec9c6cf0138554db1ecfbef890 SHA-256: e66dd9a119e71e5ceeb7959b08337582b58881e61d7bbf39344e82d69e2dc5e8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to product searches, directing users to external sites. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=apple+ipod+touch+costco+price PDF link annotation
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/7824478.pdfIn PDF document text
    • http://shtancircul.site/99323121655ykwoe.pdfIn PDF document text
    • http://rekararavufi.iblogger.org/how_to_fix_sound_delay_on_samsung_soundbar.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/logitech_z623_drivers.pdfIn PDF document text
    • http://eurosett.net/how_to_add_extensions_on_chrome_androiddgxvg.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/8ieajjc/63445827783.pdfIn PDF document text
    • https://lomasegikuporot.weebly.com/uploads/1/3/4/8/134846826/6189948.pdfIn PDF document text
    • https://libizegenumejav.weebly.com/uploads/1/3/0/7/130775388/1224118.pdfIn PDF document text
    • https://putumilaw.weebly.com/uploads/1/3/1/3/131380263/f9e4867e266a0.pdfIn PDF document text
    • http://autolombardpro.ru/92970003924zp2q7.pdfIn PDF document text
    • http://lazerepil.site/31461543930dtt6w.pdfIn PDF document text
    • http://vuzuwul.getenjoyment.net/read_the_red_queen_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/hi9ubjd/fixonolof.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/grammar_lessons_for_beginnersdcup7.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/how_to_cite_sources_in_research_paper.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/fitukadokejonujupodiwegu.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/Yjcjh69/16574345416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pepevanuretuz.epizy.com/vijewixekiriwedevifemuli.pdfIn PDF document text
    • http://tewapixu.epizy.com/53366686865.pdfIn PDF document text
    • http://miwofalixi.rf.gd/how_much_does_a_nutritionist_make_a_year_uk.pdfIn PDF document text
    • http://momugegunimex.rf.gd/why_is_my_panasonic_tv_light_flashing_red.pdfIn PDF document text
    • http://jezodefobagepa.rf.gd/gastrointestinal_conditions.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_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 4940 bytes
SHA-256: 2562fb4ae5bac94bc1e0e381a955d3ca079a964d2d610a6c5b4e7a6cee8c2047
font_01_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 10476 bytes
SHA-256: 5ff760e5fb6e78a93a0c42bd6354e956540149a2e598d09c24c3d595802a6d47

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