Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4ed261da67aa37…

MALICIOUS

PDF

73.5 KB Created: 2021-02-18 19:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f8b11e8cd6a46cf0f03d1ed873ee2d95 SHA-1: ea33a09390a1a888a3f733c81a250ac7cfe6a3e5 SHA-256: 6d4ed261da67aa37fd629d7cbf1c241ce02f02bc150b83dd47501022db3883eb
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/aws?utm_term=descriptive+comparative+research+design+definition In PDF document text
    • https://static.s123-cdn-static.com/uploads/4457881/normal_5feb020a6afe0.pdfIn PDF document text
    • http://dimax.website/beziwitedifuvokeoer2j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_600c0bcdcbd58.pdfIn PDF document text
    • http://vas-rem.ru/requiem_for_a_dream_streamingk0sgc.pdfIn PDF document text
    • http://freds.space/melodyne_serial_number_license_keyr301z.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/ruvebazij.pdfIn PDF document text
    • http://geleostone.online/11266018197w3k0x.pdfIn PDF document text
    • http://0fruits.space/pirate_ship_playhouse_plans45kas.pdfIn PDF document text
    • http://setlyb.online/shadowrun_5th_edition_core_rulebookwei3f.pdfIn PDF document text
    • http://quickstore.pro/miasmas_homeopatia9me55.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/sajowawuwunivi.pdfIn PDF document text
    • http://vigastlens.xyz/25021874818zjal3.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/fogakob.pdfIn PDF document text
    • https://werijininen.weebly.com/uploads/1/3/4/6/134635560/a955631e86.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/kagedatabujo/muvonij.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_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 5596 bytes
SHA-256: 2702fc8bb02136fda81b62d1ee895080e06cdb7625bc5d4b300e53c919c6472f
font_01_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 10052 bytes
SHA-256: 824e5d79b4756a9e3ed79849c9ee8cf97d41f8571b1c397764e5f96d86ca151d