Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9d96e3a8da800a…

MALICIOUS

PDF

74.2 KB Created: 2021-02-26 11:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f6c6955afbb6afc9631e83b7c49834d7 SHA-1: 4045c0786c412da81d920befbc62816cf88c4b2f SHA-256: ae9d96e3a8da800a15e56becb0743f0a75a16eafe4591755d06c305c75e5a498
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'gimoguvi.ru', suggesting it's part of a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=freelancer+ship+guide PDF link annotation
    • http://figimumagoko.mygamesonline.org/are_avatar_comics_still_being_made.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_6029b146e01d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_60264639e14c1.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/a_peoples_history_of_american_empire_chapter_summaries.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_600138d8c4835.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/rofokazon.pdfIn PDF document text
    • http://soldonlakewood.com/venesebifozeraxaz52et2.pdfIn PDF document text
    • http://muzoc.xyz/stein_measure_theory_solutions8you3.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/insinkerator_evolution_excel_warranty.pdfIn PDF document text
    • http://comp-arenda.site/who_are_the_anchors_on_fox_and_friends_firsty9sik.pdfIn PDF document text
    • https://siganagimub.weebly.com/uploads/1/3/2/6/132683357/b6a83fbb26f.pdfIn PDF document text
    • http://topsale.pro/aviation_weather_metar52oiy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5fd34ca69a71d.pdfIn PDF document text
    • http://getliterate.online/vuvixir2l2gf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/tuvijejonelowiwulud.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/schwinn_bicycle_pump_parts.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_do_i_factory_reset_my_portal.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_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5288 bytes
SHA-256: e61a879e8b989cead487b1f5c5b80b4fb8df0e4c700b5bb110de5c4462e70de8
font_01_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 11776 bytes
SHA-256: 96c4b7d49e518974e71a57832abfa2708e8326e9dd4159b7e085bacee34af6b5

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