Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b26c13ef582b72c…

MALICIOUS

PDF

68.4 KB Created: 2021-02-18 07:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 575aad28d2d9cee184e4cf606aa75e87 SHA-1: d97822d3f1ca712fc2c88665311644ea74552b00 SHA-256: 2b26c13ef582b72c1e3ede823d46d269dc0c6f40c9f65a9c6d3fa0f72fd02bb5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=graco%20duet%20sway%20swing%20weight%20limit In PDF document text
    • https://xivanolub.weebly.com/uploads/1/3/1/3/131380121/7076097.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5fe04dadaaf6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_6000edc62d248.pdfIn PDF document text
    • http://euroshopme.site/memuwegarunag6mt.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/kexirevexek.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/povunerajaluzun.pdfIn PDF document text
    • https://ravixolagawiji.weebly.com/uploads/1/3/4/4/134491843/nuvafawepago.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/6092893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454421/normal_5feebc660eecf.pdfIn PDF document text
    • http://centerbluebadge.com/free_slots_777g97nr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fd8f8a909298.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/pujinit/bus_simulator_game_2019_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/90741271752.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/3rd_grade_math_spiral_review_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/wizelex.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_off0000cf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9B 5576 bytes
SHA-256: 95e5fd139fca0de4afc63503053febcce8be9c29a1a9dc1c3bd57b21f101b838
font_01_sfnt_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 9960 bytes
SHA-256: a400c4e40795cd353b63a6e4fec401b89a72d8779016892d28fa9e9a49c80e51