Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb361624a736bcc…

MALICIOUS

PDF

74.0 KB Created: 2021-02-28 03:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a7159c6c6741363ae3f5ed62fda87eb8 SHA-1: bdbb3c4c70cc6e01f4b13aad957bef6fa3a4d5f8 SHA-256: cdb361624a736bccf92689b77a47b8c75b17d42ac815bff67bcffbd4a984fa64
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=diccionario+ingl%25C3%25A9s-espa%25C3%25B1ol+larousse+apk PDF link annotation
    • https://rodibafabe.weebly.com/uploads/1/3/0/7/130738722/woritadili.pdfIn PDF document text
    • https://xedawazusaxe.weebly.com/uploads/1/3/2/3/132303108/7597139.pdfIn PDF document text
    • https://vosewisujar.weebly.com/uploads/1/3/5/3/135398140/029eb8d1e5937.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/YEcUQid/polaris_indy_adventure_144.pdfIn PDF document text
    • https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/wuwomalomigorana.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/AfrkQgh/20710749653.pdfIn PDF document text
    • http://kegumexiwekot.22web.org/youtube_slick_rick_childrens_story_lyrics.pdfIn PDF document text
    • https://diwopasod.weebly.com/uploads/1/3/4/4/134475510/mudutus-nizasaguk-wabirexoxi.pdfIn PDF document text
    • https://gigunomivu.weebly.com/uploads/1/3/0/9/130970016/zigaworal_gibebepedifij_buvukofa_mujavatubexe.pdfIn PDF document text
    • https://cdn.sqhk.co/pipujevi/aYLggje/sejuwewuj.pdfIn PDF document text
    • https://kovexinuzik.weebly.com/uploads/1/3/0/8/130815277/a8bda4a64e.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/pazobebiwavuluvofob.pdfIn PDF document text
    • https://zanirifut.weebly.com/uploads/1/3/1/4/131407922/bebade.pdfIn PDF document text
    • https://gurovepulebeguj.weebly.com/uploads/1/3/1/1/131163897/d3c7bde0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidotetunuxezi.epizy.com/zonupivigugi.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_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 5548 bytes
SHA-256: bf9c79ac3ad5655675e298d1aa6085d7698b33fde20bd06a292d2afb578792b9
font_01_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 12436 bytes
SHA-256: c3a683ead32a773d36005a8a32be892f2b7d760211cf76e86afe41c025f7e1f8