Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bc5e7713970662…

MALICIOUS

PDF

69.8 KB Created: 2021-02-03 17:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c283592bcee43d18738593fdad93ec9a SHA-1: 57cc79bad052c2c13df519bc301777c06c22c1f8 SHA-256: e7bc5e77139706622038290e0e9c418116b0cc66c3461d6265651afa0bf4c49b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=simplifying+ratios+practice In PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/4089698.pdfIn PDF document text
    • http://madamzero.com/dibujos_para_colorear_princesas_disn11f1k.pdfIn PDF document text
    • http://agentsecure.space/dr_sc_sharma_accountancy_class_12_solutions_downloadecsdq.pdfIn PDF document text
    • http://boothattendant.com/lajosawogiz7n.pdfIn PDF document text
    • http://omerkatanalp.com/31309557244puawr.pdfIn PDF document text
    • http://shopee24.site/73847555135h4698.pdfIn PDF document text
    • http://shop-profildoors.ru/rarivagajogfhvxx.pdfIn PDF document text
    • http://powerpoint4you.ru/93686372505lnxak.pdfIn PDF document text
    • http://criticcxck.space/91413487294lzgah.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/pojuxiwumodixe_rimepubop_nuzosivifi.pdfIn PDF document text
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/nuvanuvudufixik.pdfIn PDF document text
    • https://gedijidejejew.weebly.com/uploads/1/3/0/7/130775336/womikumufen.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/pifijomol_dinusulubojidol_besufazebuwoso.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/lurutopobi/vaste_song_dj_king.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/android_emulator_docker.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_off0000d1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E9 5540 bytes
SHA-256: 7f36838c09652b78cd081841b4cc65b2b1b924599eaa6169b2fbd86702a72b4b
font_01_sfnt_off0000e4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B8 10604 bytes
SHA-256: 5a73478ce9b3d7735a5adc6b3e68a7890d2f8650f454e4ebee7a644c3c806264