Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea31bcd3a198fca9…

MALICIOUS

PDF

87.1 KB Created: 2021-03-21 01:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0e23f514db09b462f135108815f6aa94 SHA-1: 851e99254e70a0d4d75ad915021e85c7d470fe55 SHA-256: ea31bcd3a198fca97dcd6ec5b502218e69f2f97e55ed5884e045d88cc75a4d5a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

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://jottigo.ru/123?utm_term=meme+generator+pro+apk+cracked PDF link annotation
    • http://avto-document.site/can_i_use_text-overflow_ellipsisdhw42.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/xupejevubusonasuw.pdfIn PDF document text
    • http://teleporttur.ru/66873957475zqeeq.pdfIn PDF document text
    • http://zofiziz.getenjoyment.net/webonefumoxuwiwikew.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/tizijoj.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/75715770515.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/basic_english_worksheets_for_spanish_speakers.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/what_are_the_elements_of_a_musical.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32d8377-becf-4987-906a-1282c1d22737/salenebe.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/a_technique_for_producing_ideas_by_james_webb_young.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83855bf-c3d5-4ecc-ab86-0e6810198f14/how_do_you_fix_a_chromebook_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe56f902-0f27-437a-8d13-b01636aa8315/ar-15_fixed_stock_vs_collapsible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261015f5-906e-4a05-895e-861a859cefee/schwinn_fitness_130_upright_bike_assembly.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/international_shipping_address_format_united_states.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347b34ce-1f3c-485c-9fa8-a5a82966d45f/what_is_the_main_point_of_hamlets_soliloquy.pdfIn PDF document text
    • http://bukarujinadir.epizy.com/tepanifuvul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 5252 bytes
SHA-256: ce9902d98cb8b735896f5085e5a27a8424f6b1826efe63bead3a990014831504
font_01_sfnt_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 13024 bytes
SHA-256: 02142fbca845552049127ba81254b6b4f424083b2f3cdd99b023efb1ee7621d7
font_03_sfnt_off00013748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13748 16196 bytes
SHA-256: 1fe271517ad2bb77751c55e37003f7b4ae6111f45aa16d481ecc4a292f212b7f

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