Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf590a3786f78c6…

MALICIOUS

PDF

42.3 KB Created: 2020-10-15 02:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 826b3655ed897d2e99bc2df9f0abdc91 SHA-1: 66916b02242493832a22d31dbd5f15899e7f055e SHA-256: edf590a3786f78c64f01e403a7d5bb098b150fb377ade0542c240715c4afb609
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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?keyword=tv+tcl+android+43 In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/madeweburegola-zupalen-zawub.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/75dd1ce6df.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/79b083ee9cf.pdfIn PDF document text
    • https://site-1039752.mozfiles.com/files/1039752/toxewumetetu.pdfIn PDF document text
    • https://site-1038904.mozfiles.com/files/1038904/24105179574.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/wujumoluzabuzekeko.pdfIn PDF document text
    • https://site-1038357.mozfiles.com/files/1038357/godezunozinoparowitipeju.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/9727164497.pdfIn PDF document text
    • https://site-1039214.mozfiles.com/files/1039214/47744496433.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/wegedarekon_zixaluwifaxuves_muwobefakufixi_gitogezumi.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/migifirugolojos.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/sodotipa.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/vexudoris.pdfIn PDF document text
    • https://site-1044161.mozfiles.com/files/1044161/10770314711.pdfIn PDF document text
    • https://site-1043353.mozfiles.com/files/1043353/zugudep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3107/2415/files/jaremevoborabunowugula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7903/1712/files/37713741471.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_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 5016 bytes
SHA-256: a3e9ea004bfd210d4a72eedfc84a0867a5d6bbd2555edca7263dbd60f6ff9ef0
font_01_sfnt_off000071bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 13468 bytes
SHA-256: 630bb2ca4d64c7ec4b0a36173c83cbe84d765f8eecdbf35b1db123b29ec7b17f

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