Malicious PDF — malware analysis report

Static analysis result for SHA-256 02820d3ef5806a73…

MALICIOUS

PDF

73.4 KB Created: 2021-02-26 02:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4dd9c6ae3e1f4ec0a3c6c58d58538ee9 SHA-1: 1348282c62b395569d5027e06f45de9f0234ce85 SHA-256: 02820d3ef5806a73ba0c9f296ad33ee8094fe2230ab3a4f4f09a25fb4cd4a362
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, with one heuristic specifically flagging it as a link farm on disposable hosting. While no scripts were extracted, the presence of many external URIs suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware delivery.

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://druttle.ru/wix?keyword=plantas+ornamentales+de+interior PDF link annotation
    • http://urro-hu.com/bubble_shooter_offline_games_free_downloadf3cwo.pdfIn PDF document text
    • http://goodnatural.space/tres_veces_tu_libro_completo_en_espaololo9l.pdfIn PDF document text
    • http://omerkatanalp.com/makita_cordless_circular_saw_guideihy7n.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/genie_h4000-07_owners_manual.pdfIn PDF document text
    • http://importants.space/science_reading_comprehension_worksheets_5th_gradehixba.pdfIn PDF document text
    • http://setofexperience.site/logo_quiz_level_8_all_answerslaom1.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/lafuxilexotiw.pdfIn PDF document text
    • http://dostafood.xyz/rorabefefn4t1q.pdfIn PDF document text
    • http://temilops.xyz/521057721021a61p.pdfIn PDF document text
    • http://frasqen.online/berlioz_symphonie_fantastique_march_to_the_scaffold_analysisd1b7s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudasaki.epizy.com/wiratekogefovugudajo.pdfIn PDF document text
    • http://gozudivigel.epizy.com/define_date_format_in_phpmyadmin.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/bhagwat_gita_in_hindi_book_download.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/webster_english_spanish_dictionary_online.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/72936128358.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_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 4972 bytes
SHA-256: 25dea4a2fd2c8f53fc851cc435acca85c339dc9274866925ba5b95c85ef5a2ae
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 10524 bytes
SHA-256: a368dccfd032617412da9f2fdcd052b0f4a02f253d9f096da709676832b53ba6

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