Malicious PDF — malware analysis report

Static analysis result for SHA-256 4587a23b23b7bfcd…

MALICIOUS

PDF

72.2 KB Created: 2021-02-13 03:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 14a6d1993f8c3fe2297c5ad3cb5875a6 SHA-1: 6da797f2497a12e1af234ecb0de614070bb9d696 SHA-256: 4587a23b23b7bfcd330c058bf9ae72bb4b9dd67659f65c7701ef7272ff06e547
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://seumenha.ru/wix?keyword=the+house+of+the+scorpion+chapter+26+questions+and+answers PDF link annotation
    • https://cdn.sqhk.co/naketego/aighcgf/download_ball_brawl_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_5fd7b57148fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5fd676998ad7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5ffeb347e2343.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406481/normal_5ffabf341f77e.pdfIn PDF document text
    • https://bulasekujamur.weebly.com/uploads/1/3/4/3/134377464/nibubazawasa.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/ledebifaro-digugigejanafi.pdfIn PDF document text
    • https://cdn.sqhk.co/muribirigim/edc2psp/60440981755.pdfIn PDF document text
    • https://zuzumapi.weebly.com/uploads/1/3/4/3/134344149/magew_loresamugedubur_bebogobo_badexuwov.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/R8m6Bje/jodajosuxoregitesesuge.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/0838c003be7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450041/normal_5fd1361a7ecd3.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/63lcjfw/venom_angry_crashy_rush_online.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
    • https://s3.amazonaws.com/lukepepe/vejononitonu.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/assistir_globo_reporter_ao_vivo_hoje.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_off0000d05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05B 5544 bytes
SHA-256: da9b5eaf590ddfafaece70c1d35e82209a088e6ac32b813135c37170855a0071
font_01_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 10016 bytes
SHA-256: a97d4a87e754794b662ade46a5adb18b294cfd2466c070f410c0f0a5803e2698
font_02_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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