Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac83628415c33a2…

MALICIOUS

PDF

74.0 KB Created: 2021-02-22 13:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 16482427cab4c137640600c3c413432d SHA-1: 029f26d740ee3fe9281bb96f8b00ad0afb88693c SHA-256: 3ac83628415c33a2dcbf6f5f52ee5739b90debb4daa1047177707d5cf259df0d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://yafferge.ru/wb?keyword=what%20does%20it%20mean%20when%20smoke%20detector%20is%20flashing%20red In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_602c0ee49f59d.pdfIn PDF document text
    • http://potolkilife.ru/38278157888yxo2j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393759/normal_600936d05e4b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378167/normal_5fe0319c4a983.pdfIn PDF document text
    • http://umdtheatre.ru/kukidibupifijugjljir.pdfIn PDF document text
    • http://baby-slings.ru/53972901879w9h3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafiwogi.rf.gd/chiang_mai_local_guide.pdfIn PDF document text
    • http://xinuxupenaze.epizy.com/tafabusutukikesazikisoxi.pdfIn PDF document text
    • http://sibubixusa.epizy.com/schengen_visa_application_form_bulgaria.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/1191833599.pdfIn PDF document text
    • http://wojudor.epizy.com/bozevelamew.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/58880035071.pdfIn PDF document text
    • http://fazegixedibuw.rf.gd/sheridan_cotton_sateen_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/ap_world_history_modern_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/16235943730.pdfIn PDF document text
    • http://torowenakatum.epizy.com/advanced_excel_functions_for_finance.pdfIn PDF document text
    • http://zijaxana.rf.gd/best_freelancer_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/tinubijexap.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_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 5604 bytes
SHA-256: 84583d25f037efa9bf7b064132490c37afd96648868f5401f9b852480f0e9e82
font_01_sfnt_off0000f505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF505 11072 bytes
SHA-256: 4257697058f42f7f53a850ef2a66b6ebf1cefb31dfee335c79ca0c8ae0dd8a76