Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca19b32cef42ac2…

MALICIOUS

PDF

80.8 KB Created: 2021-04-01 23:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 57072e7fd467e217bec3f73abcca1dc1 SHA-1: c591e6afe10c475d794b5a5d2ee1b66e077582f4 SHA-256: 7ca19b32cef42ac2782ffa0b4c3b4ecb38921612d74a6a3148c377b60bc59653
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/wix?keyword=super+toss+the+turtle+hacked+apk PDF link annotation
    • https://cdn.sqhk.co/vaxarogajib/TtiiU4R/ind_safety_reporting_regulations.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/gdEXxoM/shadow_fight_2_ki_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/NQtjhEM/lenesusiwos.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/hKhcgYM/21132039437.pdfIn PDF document text
    • http://mimedilubaj.22web.org/power_pressure_cooker_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/dEjehj5/descargar_morph_mod_para_minecraft_1._12_2.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/hfgfjbb/natisisuke.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/iz2z6pl/servsafe_manager_study_guide_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/jljdknO/digital_marketing_strategy_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/c3qy3ia/android_studio_debug_log_not_showing.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/937a85d9-615d-4db6-a87b-f1c1dbb80dbe/32708979352.pdfIn PDF document text
    • http://gitogopafo.epizy.com/27634956774.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_52ee3bf01a5f4c23bc45d2b127e66ec8.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_86d6496b4171423cb5826a86f63a3a56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/859e5844-cdde-4678-8cb3-67d6fe412a1b/las_enfermedades_mas_comunes_del_sistema_endocrino.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_c401c77538b54f08980f0fdcd48a7cec.pdf?index=trueIn PDF document text
    • http://lozinirano.epizy.com/how_to_draw_chibi_anime_characters_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34278ad-e99a-4a89-8e7e-082ee0e55495/37297599442.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_e8349e6f21284f7688e8c49fd3db5e5b.pdf?index=trueIn PDF document text
    • http://jidariramosofaf.rf.gd/monster_anticipation_guide.pdfIn PDF document text
    • http://pukerobedu.epizy.com/ccrt_material_for_art_culture.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_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 5328 bytes
SHA-256: 4726574da144968acd935d32f4e414b1fca447b3e6f0aa951a88c969de6a4292
font_01_sfnt_off00010f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0E 11620 bytes
SHA-256: c65ca77755d72df5f09de9f6524b22da3392e98afa8060e9a05c8ff8d02ea7c3

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