Malicious PDF — malware analysis report

Static analysis result for SHA-256 e814db6e1c49daa3…

MALICIOUS

PDF

66.1 KB Created: 2021-02-14 02:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 773cbc82de6bfe2c6ca4d3bdd7359f53 SHA-1: 8b98f01329b67d8c716a6a96747754273d97c5d1 SHA-256: e814db6e1c49daa34ada37e07c545584efae98a85e00393af005dac8433ff5b9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://maypoin.ru/aws?utm_term=apostol%2527+s+calculus+pdf PDF link annotation
    • https://viremekim.weebly.com/uploads/1/3/1/4/131407965/5f5453d38c215e.pdfIn PDF document text
    • https://nuduxojobiri.weebly.com/uploads/1/3/4/6/134629521/fewolufi_zujajebenok_jiguzadamat_dazanoje.pdfIn PDF document text
    • https://biresunidulili.weebly.com/uploads/1/3/1/8/131856549/xodetox_pewegakipe_nasaruzakof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408333/normal_5fe028713571c.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/4755551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5fd63999c5399.pdfIn PDF document text
    • http://gidepel.22web.org/calculator_app_for_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453906/normal_5fef46277041e.pdfIn PDF document text
    • https://xekanowodupap.weebly.com/uploads/1/3/0/7/130739303/gotipolowani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_601f7c1de760a.pdfIn PDF document text
    • https://melonugijiroduk.weebly.com/uploads/1/3/5/3/135325977/dbbb20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421213/normal_5fdf16e859666.pdfIn PDF document text
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/219607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://repibikapowa.epizy.com/akele_hum_akele_tum_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/used_sheet_metal_folding_machine_for_sale.pdfIn PDF document text
    • http://rusuxagek.rf.gd/62541616091.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/hybridization_in_chemistry_class_11.pdfIn PDF document text
    • http://vezapuro.rf.gd/non_disclosure_agreement_template_word.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_off0000c97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97B 5076 bytes
SHA-256: 5ed6231c365bb0d54abcce41a4c556290f87c2791f6aab90b28a026f210970c1
font_01_sfnt_off0000dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 9644 bytes
SHA-256: 3a0c0d13fab2a8cb79edf2d9ff3cd256a73369385ee3bbfa68e0bd04c541365e

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