Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c0e45107717c12…

MALICIOUS

PDF

64.1 KB Created: 2021-02-18 08:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 57e2ad09a5fed68a51af246cab3df4a7 SHA-1: 0e83187302e49d7631077ac24f4cedbc8e91a695 SHA-256: 55c0e45107717c12a5a61c07deac84a3fc48c5e22f6e79b12ef52a1308e5999b
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=ap+biology+evolution+frq+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5fe6640817ceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_6017fe9186413.pdfIn PDF document text
    • https://figagukedeliv.weebly.com/uploads/1/3/4/0/134040575/eea2d947386524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5fe92dbdd38d7.pdfIn PDF document text
    • http://subeziti.22web.org/chehra_masoom_jiyani_ringtone.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/98582830405.pdfIn PDF document text
    • http://niverokime.iblogger.org/reading_piano_sheet_music_tutorial.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/6425711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kukejisagev.epizy.com/rasigugunevamejuxatixu.pdfIn PDF document text
    • http://waduxixefe.rf.gd/birthday_card_template_for_teacher.pdfIn PDF document text
    • http://dulaxidej.epizy.com/dumekevitenakibibudakirag.pdfIn PDF document text
    • http://zorijofoxafa.epizy.com/85513696250.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/cover_letter_template_for_retail_management_position.pdfIn PDF document text
    • http://vefazuxugog.rf.gd/93928758021.pdfIn PDF document text
    • http://zepenolewiri.epizy.com/process_documentation_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B9 5460 bytes
SHA-256: 74a4a94d65541ea373c9975f16e44b7161cc0c437a944af30edfba51b40897fd
font_01_sfnt_off0000c467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC467 9724 bytes
SHA-256: f3cf9a8e6b005d734a7562f2a02440e2c73ad639c044c7a182ffaf29a89b7594
font_02_sfnt_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c