Malicious PDF — malware analysis report

Static analysis result for SHA-256 553ad3b8f4d428b8…

MALICIOUS

PDF

70.8 KB Created: 2021-02-19 13:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 227c36b6c30bdf95d0f8e2a40068bdf9 SHA-1: df6eaa3eaff7716393cbcade584ebc698ac65877 SHA-256: 553ad3b8f4d428b88d937834815c9a04c94e5e4a012843395887a4053fbb9123
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://bologen.ru/wb?keyword=vanity%20fair%20book%20author PDF link annotation
    • http://forumapu.iblogger.org/6055620800.pdfIn PDF document text
    • https://wupanotowi.weebly.com/uploads/1/3/1/4/131406855/soxisolez.pdfIn PDF document text
    • https://niromegezos.weebly.com/uploads/1/3/2/6/132681660/muwelujak.pdfIn PDF document text
    • https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/jiwizutog-rulakokewuti-rikikunol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_602037d17a5f3.pdfIn PDF document text
    • https://gimuloge.weebly.com/uploads/1/3/0/7/130775506/saxolofod-gosefurunaw-juduk-dujof.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/6655968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_602a35daa3af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457560/normal_601e81cfa6be5.pdfIn PDF document text
    • http://smallita.space/17562377166erwuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389376/normal_5ff7831fa6e4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_602283206e788.pdfIn PDF document text
    • https://venolebibu.weebly.com/uploads/1/3/5/3/135348563/segimidufedetewu.pdfIn PDF document text
    • http://montana-media.com/bleacher_report_nba_draft_showy0cah.pdfIn PDF document text
    • http://arendaavto.taxi/36743394061vfg2w.pdfIn PDF document text
    • https://xobiduri.weebly.com/uploads/1/3/1/4/131437628/pusanoxofiwirur_budotu_vububepupe.pdfIn PDF document text
    • https://cdn.sqhk.co/wolowivem/jcgjNEs/betujudunulabapikag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabozet.epizy.com/live_stream_tv_apk.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_off0000da4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4D 4916 bytes
SHA-256: 134ac49a167496bce07fba90475299d1a0820cce277fab6ef4006e167818ecf9
font_01_sfnt_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 10528 bytes
SHA-256: e8d60d2bd5790266c03313d5a34dd083ed4696bca69307f699029e94a51886f6

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