Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b4399b19159793…

MALICIOUS

PDF

37.1 KB Created: 2020-10-04 14:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 82c9f85a2c2f3007522a441838f1e97c SHA-1: 7365bd5c488e59d77f7c0b27e85f72971f83b623 SHA-256: f2b4399b1915979399e1163f495aba9e14587fb7bc959854e995ce3126e90914
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/pify?keyword=bicycle+rear+view+mirror+for+glasses In PDF document text
    • https://site-1039645.mozfiles.com/files/1039645/77783870803.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/86263714493.pdfIn PDF document text
    • https://site-1039393.mozfiles.com/files/1039393/faredoti.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/jopife.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/20941941018.pdfIn PDF document text
    • http://files.bearcatmusic.org/uploads/1/3/1/4/131453255/zoramimuvinu_golix.pdfIn PDF document text
    • http://files.suitandapron.com/uploads/1/3/1/1/131164234/vubafuse.pdfIn PDF document text
    • http://gujode.psusdhistory.us/uploads/1/3/1/0/131070313/752563.pdfIn PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/82556230896.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/xivenigawifub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000517e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x517E 5504 bytes
SHA-256: 7375801f320f33a15df64ccab2eed121630071f05125c47f8288104d00444f9c
font_01_sfnt_off0000644a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 10524 bytes
SHA-256: 604cf443e9061a50919850726486f40026172d1bcf8fcd60790001aca906e873