Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c801537fec9968…

MALICIOUS

PDF

68.3 KB Created: 2021-02-15 03:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9396b52803cd1f9529628efd7495e4a8 SHA-1: eac65a44844627ebbc94e1bd388508de5f29679b SHA-256: d8c801537fec996880dbfea2cca0ee9b76d4d9a053954c427d12dc17be79f713
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://druttle.ru/wix?keyword=business+ethics+exam+questions+and+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406463/normal_60186b487d704.pdfIn PDF document text
    • http://povar2020.site/boa_christmas_running_shortso76ij.pdfIn PDF document text
    • http://hookup157.site/886368377dy2fa.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/bemixeniwowo_vosegurapevev_mananira.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/MhbPeMo/pesamadamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_6015a2f7bf95b.pdfIn PDF document text
    • http://prizinsta365.website/66521773393exy0v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_601380cdc3766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_5fd284562bbb1.pdfIn PDF document text
    • https://legufita.weebly.com/uploads/1/3/4/8/134866723/xopozezezobesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_60216a2627f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_5fdc888d8adc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_6028f4909bef3.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/7a3eca143.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_off0000cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC5 5484 bytes
SHA-256: 290a7fd2072f8853f39f7ce3f992cbdff0a9243157943b7cf6724e07e7036fd9
font_01_sfnt_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 10340 bytes
SHA-256: 8cc8d7b2d249db998a091359a29f0ed6ffb11dd572e925474b6279925b1d289f