Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24b6be698089439…

MALICIOUS

PDF

73.1 KB Created: 2021-03-09 17:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e6ef08e24cd0bf2ea6f41f49951565cb SHA-1: d6d42e151d15da67b4a6c6733e3fd4a82295cbf0 SHA-256: b24b6be6980894392a53ddb3c72a20329265a6e43ed88858624364bce2472963
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous external URIs pointing to disposable domains, such as http://izzzaaa.space/kafubobilibabeky0gaz.pdf, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest it's used as a lure for initial access, likely via spearphishing.

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://kuzutuzo.ru/123?utm_term=holotropic+breathwork+music PDF link annotation
    • http://izzzaaa.space/kafubobilibabeky0gaz.pdfIn PDF document text
    • http://thelait.pro/zadozolegc4lhs.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/printable_knot_tying_guide.pdfIn PDF document text
    • http://bitjoms.xyz/johnny_bonasera_1_mod_apkryuln.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/bhf1Pgg/horror_scream_sound_effects.pdfIn PDF document text
    • https://latibexuwer.weebly.com/uploads/1/3/0/7/130776356/767ac78a16da7.pdfIn PDF document text
    • http://infonewsuk.site/94122733007ojlnq.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/0ghhaKf/lagikelerun.pdfIn PDF document text
    • https://rixajijinuroje.weebly.com/uploads/1/3/4/4/134473879/ee5f5.pdfIn PDF document text
    • http://instapriz24.site/smart_watch_phone_u8_bluetooth_touchscreen_smartwatch_for_androidokszs.pdfIn PDF document text
    • https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/xubijesubutosog.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/why_is_my_ps_vita_not_charging.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a045dd-f2f1-4170-b50d-2cde5dfc406f/frigidaire_dehumidifier_ffad7033r1_disassembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8f6f67-e07d-4e43-aa0b-d4ba94326791/38704557237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3aed57-34d6-4b76-bcf8-14c3afb45cd9/the_electric_state_book_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ef17be-c103-4242-b23c-048964d1a782/luxpro_thermostat_psp511lca_not_cooling.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/asus_rt-n12_3_in_1_router_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a79b55c-697c-429f-854d-8bec0397d750/54244802371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9081dd17-806a-4777-b2bf-3c7dc7dea7ae/nurefozizuvixojidazup.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_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 5428 bytes
SHA-256: 004957bd60deaf972738e6bd72c1d57257327de422b1b85ef428e76076aa02cb
font_01_sfnt_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 10532 bytes
SHA-256: 2542d0d2e558e955268dd8d0484514a58ebf97bb303e7c429a3bed646b130d81

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