Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b275112a04aeef…

MALICIOUS

PDF

70.6 KB Created: 2021-02-16 18:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: bc47b0a90c9316ad8ef29a51e064deb4 SHA-1: 7daf03663e8038fbc303556e58fd5c4f04cf7a5c SHA-256: 56b275112a04aeef33cff45afb0d5af3f1a911ee04cb9a08af2208846857602e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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/wix?keyword=mike%2527s+kiawe+broiled+huli+huli+chicken+kahuku+hi In PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/fexubovikura.pdfIn PDF document text
    • https://wixalotoduf.weebly.com/uploads/1/3/5/3/135305273/fd79be3.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/4960142.pdfIn PDF document text
    • https://topipanonotege.weebly.com/uploads/1/3/4/6/134679812/tutesakesu-fogul.pdfIn PDF document text
    • http://emirofficialzm.com/how_to_say_primary_care_doctor_in_spanish1o6bt.pdfIn PDF document text
    • http://keferadewurilej.22web.org/22173721621.pdfIn PDF document text
    • https://lumikefobebodas.weebly.com/uploads/1/3/4/3/134324067/2b9a5d0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidusigugowubo.epizy.com/riseziwe.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/papulubuzaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/present_information_and_broadcasting_minister.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/kuturotow.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_off0000d87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87F 5360 bytes
SHA-256: 6fffc6ba640627ef7a6a4a31b7beb1dc3bf0e31ced8db3480e88179d3c1b08d7
font_01_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 10216 bytes
SHA-256: 023707c953572e043991191a8a2f385918688177d350836ec6c8b019d5df7ae3