Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c50b6dcde1f926…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 06:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 87897aa1cf85581728e82d96144183f3 SHA-1: c0b911fb39bda08b9a5c76af6da848fbabf2dc6a SHA-256: d4c50b6dcde1f926b3fcb9c352b22d8dcb9cd91e71714a5dbf6b03bf7cea3edd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/award?keyword=how+do+preschoolers+learn+through+play PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486552/normal_60369f1722888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393486/normal_600853b1d809c.pdfIn PDF document text
    • https://murarukaxew.weebly.com/uploads/1/3/4/6/134666391/a3d5ade3ca.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/mesuxoxavaz.pdfIn PDF document text
    • http://delinapod.mypressonline.com/does_kriya_yoga_work.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/wood_top_coffee_table_with_metal_legs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_6024fe78b732a.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/jajhigj/napalm_death_breed_to_breathe_lyrics.pdfIn PDF document text
    • https://galevegu.weebly.com/uploads/1/3/4/5/134507196/2203742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_5fd1a189a3995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5ff29fda1fb84.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ciipBgc/tibazokimiwe.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/epson_v370_perfection_flatbed_scanner_argos.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/fezoret.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/paxunu.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/hjGYg0N/54596622827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DA 5488 bytes
SHA-256: 3349159c276705994694935971147f611b1f09c9d6c73b25bb84a96f871656d6
font_01_sfnt_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 10076 bytes
SHA-256: b96afc0d4d31507837cbd763e21f98aa6ea4490838af0f6814120cb09b87df5b