Malicious PDF — malware analysis report

Static analysis result for SHA-256 86234c8c48755e90…

MALICIOUS

PDF

62.0 KB Created: 2021-02-19 06:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b498363de5b301f9ba27a4e7c2147510 SHA-1: 5b9c96c6c68bd05b0d45d0a263a04eb6a8bc0ac1 SHA-256: 86234c8c48755e908514238f134b207068cd1e6809f16b5d24dae9afd765ac33
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=signing+naturally+units+1-6+unit+4+review+answers PDF link annotation
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/28a07ca3.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/3740593.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/high_hopes_song_piano_sheet_musicj2hij.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/2351064.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/zajavuzapiwujik_vifegosiraj_miwasoxik.pdfIn PDF document text
    • http://twobigs.space/electromagnetic_force_worksheet_answerss2wp1.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/tedopidi_falikof_wiserona.pdfIn PDF document text
    • http://sy0n.icu/chaos_movie_freet1yk4.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/2200918.pdfIn PDF document text
    • https://zonotilikoper.weebly.com/uploads/1/3/1/0/131071062/4151893.pdfIn PDF document text
    • https://nolilozeto.weebly.com/uploads/1/3/5/9/135957670/witav.pdfIn PDF document text
    • https://wojizenufojanog.weebly.com/uploads/1/3/4/7/134724603/zafiwuwuwunu.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/luropi/38556238552.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/camscanner_pro_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/sonar_platinum_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/sybsc_syllabus_pune_university.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_off0000b542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB542 5536 bytes
SHA-256: a8002576d82d124fb7403adcdd43e7e4400742943fefc56035f2683077712e5f
font_01_sfnt_off0000c855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC855 10096 bytes
SHA-256: 0fb2ac02d43678c8c94731d5a4d988d7b490b092c326777afd54e7d362585c33