Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a3ba906ea9d41a…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 18:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3d88ad3a42c78d9b9fe957ea5cb5a873 SHA-1: 10eb740b563e08dc834a11b0e0a3d04422ade52f SHA-256: 52a3ba906ea9d41a5de6c983d1d7b79fbbdac10e3d26c4cb231bd4f97a0f121b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=rare+beautiful+genetic+traits In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5fec458fa65bf.pdfIn PDF document text
    • http://bella24.xyz/verb_adjective_noun_worksheetjuolc.pdfIn PDF document text
    • http://gimogorox.22web.org/vw_carstick_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/HthgX7L/cube_maze_quiz.pdfIn PDF document text
    • http://redpandarecycling.com/kajofepamupipibuokexh.pdfIn PDF document text
    • http://bella24.xyz/40093017792if288.pdfIn PDF document text
    • https://cdn.sqhk.co/teganipuputu/I0jb4gj/51340168079.pdfIn PDF document text
    • http://erogancolumbia.site/korobuluruvorjp67d.pdfIn PDF document text
    • http://interbank.link/robert_bresson_notes_on_the_cinematode4ha.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/xigijevipilodejewed0c0ku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5fd9c9f0cdb25.pdfIn PDF document text
    • http://mebelrostov.ru/51507370165hlqp6.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/dazutun/voruwotuz.pdfIn PDF document text
    • http://zonadomafi.rf.gd/mathematical_analysis_volume_2.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/nursery_rhymes_poem_free.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_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 5196 bytes
SHA-256: 43ca0a483262342eb243ebe2d44699b4a397b89c9a7c99403d2b4c6d9138bb68
font_01_sfnt_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 12468 bytes
SHA-256: 8f661ed0b7dd275dc17c4562f7ebd6d727daf6fd04ce0d23d72933d459a24127