Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e23c7c7549bc4a…

MALICIOUS

PDF

66.6 KB Created: 2021-01-26 19:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a7ce150abea3e24b4ee632cee4e6ab65 SHA-1: 0872fae9c8d40bcb96e11233fa7e5fad7553499d SHA-256: d2e23c7c7549bc4af1ba72d2cb2bbf5dd72475bb3d94c4096ec5ef7d6c6727e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to disposable domains or link farms, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to URLs and metadata consistent with malicious PDF lures.

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
  • 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://baarspo.ru/123?utm_term=nate+temple+series+-+shayne+silvers PDF link annotation
    • http://nanolenka.xyz/465737457539bbvq.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/xirejamimipegid.pdfIn PDF document text
    • https://dolufinome.weebly.com/uploads/1/3/5/3/135330980/gofod_wupomedurazowo_jabigenifomit.pdfIn PDF document text
    • https://tagalevef.weebly.com/uploads/1/3/0/8/130815582/2673241.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/hfwhhjd/snake_colors_poisonous.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/dhjhgjf/dobinesezidaba.pdfIn PDF document text
    • http://xexogafuko.22web.org/fishing_report_upper_green_river_wyoming.pdfIn PDF document text
    • https://cdn.sqhk.co/xojafimib/xhbjjhf/18340820314.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/3jcXhbV/nuxizenufeta.pdfIn PDF document text
    • http://dazixetenulega.22web.org/bovine_spongiform_encephalopathy_epidemiology.pdfIn PDF document text
    • https://cdn.sqhk.co/fotusonetagu/spjdChc/gaturupozevud.pdfIn PDF document text
    • http://chatik85939775.fun/basic_rules_for_discord_serversm2qy2.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/aa601a31ce38aaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/boidhjj/dynamons_2_by_kizi_mod_apk_home.pdfIn PDF document text
    • https://jetabasujupeg.weebly.com/uploads/1/3/4/7/134703241/a632d2b.pdfIn PDF document text
    • http://onlineeshop24.xyz/78614443745alp37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nigukeja.epizy.com/96774224785.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA73 4900 bytes
SHA-256: 4c6037fda8e0eb1b7e39bd1f78699e9a868847f27fafd73129f73e1826a141b0
font_01_sfnt_off0000caf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF4 10944 bytes
SHA-256: cabb6260a1a0bf3817b9cdcdf0652122968e9b93988c35959868b557e8b00a05
font_02_sfnt_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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