Malicious PDF — malware analysis report

Static analysis result for SHA-256 425c902fe2ca035c…

MALICIOUS

PDF

63.3 KB Created: 2021-02-20 05:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: efa2730c5cf97d472b3011f9bcd3306c SHA-1: f8679cf2c4dfe9e914d2ce125d5df799c031f983 SHA-256: 425c902fe2ca035c9a48b596cff5ef5d16e4f10e16c47928ac3e88d777f2f87f
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=chapter+16+review+answers+biology In PDF document text
    • https://cdn.sqhk.co/dodagirojep/hfhig7K/66816248816.pdfIn PDF document text
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/vegebat_rerukulixaso_sikafarine.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/23a2bb.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/gjYjggd/busipalejupoxedugomikut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368742/normal_5ff3a01499a9c.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/iu4fiii/miraculous_ladybug_characters_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/D2bgjs2/goguponifov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403262/normal_5feb19665dd77.pdfIn PDF document text
    • https://diwopasod.weebly.com/uploads/1/3/4/4/134475510/dusuxoluzex.pdfIn PDF document text
    • https://cdn.sqhk.co/muditazu/ijezvjg/anime_tiles_piano_music_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/jdjejjR/2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/PlwFHhf/gexen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5ff26105d9f5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_5fef8cf0d8381.pdfIn PDF document text
    • https://lijogidatu.weebly.com/uploads/1/3/2/3/132303170/875b61f95f524a.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/kisezirukot-supir-gizibeve-dedijavomopi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gerufufa.epizy.com/6549276390.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/the_campout_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/bihar_sales_tax_c_form_verification.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/articles_of_incorporation_template_for_non_profit.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_off0000bd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD09 5588 bytes
SHA-256: cc248304ede336faebaad5f27fa38e8ff574c6895ec96fbef072f8206605badf
font_01_sfnt_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 9292 bytes
SHA-256: 161d1a28bef7bc08eadb53a1f39f65c101b9ba4ae8ddc590a2e104538e685696

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