Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13b7a6b67ea2406…

MALICIOUS

PDF

82.4 KB Created: 2021-02-11 04:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 190b99ee04b382e1b4a44b1abdd77d60 SHA-1: d08a5c25c7c9562c9b31539b5b4c2e4a03b1e0cb SHA-256: a13b7a6b67ea2406ce4a178628f479789e0332ea9bfff46eb2c8d7b0f3fa8a29
126 Risk Score

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://leonvi.ru/123?utm_term=partial+derivative+chain+rule+practice+problems PDF link annotation
    • http://b4shop.icu/savaxufvvm75.pdfIn PDF document text
    • http://pumba-timon.space/283911698450pv5g.pdfIn PDF document text
    • http://ig-support-service.com/73272043305q3vqz.pdfIn PDF document text
    • http://hookup153.online/daponabenarokudogizabpbewc.pdfIn PDF document text
    • http://dostafood.xyz/wushu_shaolin_kung_fu_online_coursel3b3x.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/fudijesilipun8p07.pdfIn PDF document text
    • http://uscovidcharts.com/mathswatch_clip_205_grade_7_answerspdwvj.pdfIn PDF document text
    • http://studyweb.site/nowigakirowegolavonetato88y7.pdfIn PDF document text
    • http://zabunugakope.22web.org/38953073639.pdfIn PDF document text
    • http://myshoes.moscow/equivalent_decimals_and_fractions_worksheetm8k7r.pdfIn PDF document text
    • http://betmoy56.com/43904649690u1cwr.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/prison_architect_design_guideop0cw.pdfIn PDF document text
    • http://moshon.space/nice_guidelines_brca_testingmw92g.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/rupatojuko/zofulel.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/58834629623.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_off000104ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 5512 bytes
SHA-256: cbdc71c3046025adf8bf78da50be5920f84cbc719a30832d2c1052fa5dee6c8a
font_01_sfnt_off00011778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 10928 bytes
SHA-256: f464b39edce5575d8d6635f0d3e17e0f18fe4cac7759cf38a34885a4278ff5ac