Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace644937986655d…

MALICIOUS

PDF

77.2 KB Created: 2021-02-20 16:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 94b90237e663d423d8f3699ac579ef54 SHA-1: 134b74c6cadf4597c746f4fda992e794ee4ac23d SHA-256: ace644937986655dd061c816e12464844069cf44d962ec88e82589bc53686281
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wb?keyword=merit%20badge%20pamphlet%20library PDF link annotation
    • https://cdn.sqhk.co/loxepafigav/hR74Qha/54953247792.pdfIn PDF document text
    • https://tuwazumabokanif.weebly.com/uploads/1/3/4/6/134611666/5589635.pdfIn PDF document text
    • https://cdn.sqhk.co/salosegebomi/OJUjfi7/find_and_destroy_tank_strategy.pdfIn PDF document text
    • https://daxejinuvu.weebly.com/uploads/1/3/4/6/134645798/gavimemosit-kefunomene-mirita.pdfIn PDF document text
    • https://cdn.sqhk.co/wixedineve/bwIJCwO/85934939314.pdfIn PDF document text
    • https://cdn.sqhk.co/gimiraxu/ifhhfif/91409990322.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/mikimikewomitumitiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/aFggOgi/tewinedumedenufenavabetib.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/72YgjDI/new_mix_apple_music.pdfIn PDF document text
    • https://mozeduxazos.weebly.com/uploads/1/3/4/0/134018133/a62024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poziluxolebulu.epizy.com/fimoduwiv.pdfIn PDF document text
    • http://wetizizokixo.epizy.com/using_context_clues_worksheets_4th_grade.pdfIn PDF document text
    • http://sobofepexenux.epizy.com/2006_lanternfish_esl_water_cycle_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/konabujizemodalafabijeno.pdfIn PDF document text
    • http://riwekijeworore.rf.gd/kakuravoboxirepibuvewazi.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/51483749250.pdfIn PDF document text
    • http://zikofizoredu.rf.gd/photoshop_calendar_template_2019_psd.pdfIn PDF document text
    • http://nekajisez.rf.gd/con_te_partiro_andrea_bocelli_sheet_music.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_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 5444 bytes
SHA-256: d7239fa7bacf2194277134370fa12acead5502625e2e7772e9224fcbb461def1
font_01_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 11092 bytes
SHA-256: 71808909067200728196374472922681110eae6104c44241dbdb0b19321e08f1

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