Malicious PDF — malware analysis report

Static analysis result for SHA-256 064b9bcf3b297f99…

MALICIOUS

PDF

72.1 KB Created: 2021-02-20 07:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a5e8decd9ea957d5817fc7709010db83 SHA-1: 3e1294187f74183d6314713fd6e36e720e190288 SHA-256: 064b9bcf3b297f997bf13593b8ff05ef82332ad58af6c19373834021b0adf0ff
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=appvn+apk+download+ios In PDF document text
    • https://bilidugudixuxo.weebly.com/uploads/1/3/4/9/134902455/2610207.pdfIn PDF document text
    • https://lukibufipijuzom.weebly.com/uploads/1/3/3/9/133997252/lojorajuro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419424/normal_5fcf1ecc57cc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451027/normal_5fdfa196f2a58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5ff06d36daa10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600ddef6a382a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukowinom.rf.gd/anti_malware_tool_free.pdfIn PDF document text
    • http://pinezininefos.epizy.com/australian_breastfeeding_guidelines.pdfIn PDF document text
    • http://vufuwuxe.epizy.com/inverse_of_logarithmic_functions_worksheet.pdfIn PDF document text
    • http://moxevigevawoko.epizy.com/19900579560.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/word_templates_weekly_planner.pdfIn PDF document text
    • http://dakunexafabeve.epizy.com/6718848248.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/article_370_bare_act.pdfIn PDF document text
    • http://zubeleboju.epizy.com/firepower_1000_series_datasheet.pdfIn PDF document text
    • http://mesepojo.rf.gd/bahut_hard_lyrics_gully_boy.pdfIn PDF document text
    • http://duzujowe.epizy.com/answer_phone_on_samsung_s5.pdfIn PDF document text
    • http://biwomilorawud.rf.gd/dvorak_humoresque_cello_sheet_music.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_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 5064 bytes
SHA-256: aea9b8e1b5c078d1e1910bc4a65410c7c702458a7d9ac9fc8c6f6b204cd85dd6
font_01_sfnt_off0000f07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 10372 bytes
SHA-256: dbcf3f14295c5baeb3396744a432411e0cb074aec7fdd1bad7412724e59e5147