Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a7d4ca3d416cdd…

MALICIOUS

PDF

66.9 KB Created: 2021-01-22 05:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-07-02
MD5: c3c15ed7d0b5fc5364095f63c25ffda7 SHA-1: 8c372a1fa65d7c2746601c1c4b773fe93af499bb SHA-256: 57a7d4ca3d416cdd7b2253426a74f78a23821d67611fdb108bb7f51c966caa2f
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://ggtraff.ru/123?utm_term=skinny+mens+overalls In PDF document text
    • https://site-1191779.mozfiles.com/files/1191779/airpods_android_sonido_bajo.pdfIn PDF document text
    • https://banukusisazej.weebly.com/uploads/1/3/4/8/134893357/75bbb.pdfIn PDF document text
    • https://site-1178255.mozfiles.com/files/1178255/latex_template_article_two_column.pdfIn PDF document text
    • https://poxosopetijonaj.weebly.com/uploads/1/3/1/4/131453527/307dbc21d.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/7iijaia/2542183101.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/e6bd788ab.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/6371558.pdfIn PDF document text
    • https://site-1173612.mozfiles.com/files/1173612/80824631028.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/sTghhih/4603931447.pdfIn PDF document text
    • https://gurekageta.weebly.com/uploads/1/3/2/6/132695257/7334134.pdfIn PDF document text
    • https://site-1180410.mozfiles.com/files/1180410/62548247893.pdfIn PDF document text
    • https://site-1178403.mozfiles.com/files/1178403/backtrackit_musicians_player_apk.pdfIn PDF document text
    • https://lukidamovepuk.weebly.com/uploads/1/3/1/4/131437538/nomalid.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/mupuxunafa_bubuxobanu.pdfIn PDF document text
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/megogekapaneg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexalawisilinot.epizy.com/38383073954.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/erikson_stages_of_development_worksheet.pdfIn PDF document text
    • http://peburameg.epizy.com/pan._baidu_er_online.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_off0000ca8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8C 5160 bytes
SHA-256: 8d0d080b839d74bb720955ba8414a83f6fc29d53f36925c40bf3fd096b1d0ab1
font_01_sfnt_off0000dc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0E 10192 bytes
SHA-256: ada9410729e813838601f6cf2161f0bce654df915ba3e4c8ad061a2bc58e50ac

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