Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9c9dbddedef50a…

MALICIOUS

PDF

70.0 KB Created: 2021-02-09 01:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1b5617fdcea56af3e231f174bd83b5de SHA-1: 1f16073d1e6c9df0d2c80a8fccebd8163ac484b7 SHA-256: 9a9c9dbddedef50ad621e99f9d8e3fd98acdbbb5fe83b9870d8f69045ee59775
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=centimeter+and+meter+worksheets+for+1st+grade PDF link annotation
    • https://cdn.sqhk.co/jixuvepabu/zif3foi/h_and_m_landing_phone_number.pdfIn PDF document text
    • https://marejipafikelor.weebly.com/uploads/1/3/1/4/131437604/juraw.pdfIn PDF document text
    • http://clyb-wylcan3.space/74993906020b2y4r.pdfIn PDF document text
    • https://gisidamuxifa.weebly.com/uploads/1/3/0/7/130775495/totuz.pdfIn PDF document text
    • https://zowomotoridaxa.weebly.com/uploads/1/3/1/4/131438570/6898145.pdfIn PDF document text
    • http://wildboost.club/guitarmaking_by_william_cumpianolf38u.pdfIn PDF document text
    • http://lynciguest.com/stephen_gossontzf2t.pdfIn PDF document text
    • https://niwarixetawozav.weebly.com/uploads/1/3/4/1/134108921/5657488.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/xizidet.pdfIn PDF document text
    • https://movadopudi.weebly.com/uploads/1/3/0/9/130969115/7543562.pdfIn PDF document text
    • http://microdigitalmeter.xyz/20046000027iz2lk.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/b34218fcab3f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujixus/97813070055.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/cantaloupe_island_sheet_music_bb.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/colocar_prefixo_automatico_android.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_off0000d501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD501 5404 bytes
SHA-256: 105781b27821fac36e4923eb9ed8c91883a97e80d3e82aaab85250f52dad5425
font_01_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 10420 bytes
SHA-256: 1c2b934648312f2d61df1b5c6fa19e3f89ce044ba21fe738654637210504eb87