Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8f28e179ce2289…

MALICIOUS

PDF

34.7 KB Created: 2020-10-06 22:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9d1a764440e737eb7fb70d355293d7d0 SHA-1: 34c7f7f4e4441f89373b6ac2c44b0781b11830e5 SHA-256: cd8f28e179ce2289e8b39c051ec0ee7963d3b72355910d58e723037cd957adc4
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://gettraff.ru/strik?keyword=the+design+collection+revealed+creative+cloud In PDF document text
    • http://gapujale.sccrrace.com/uploads/1/3/1/4/131406149/jejozilibexebot.pdfIn PDF document text
    • http://files.nienke-bodenheim.com/uploads/1/3/1/4/131438567/wemiritozubamol.pdfIn PDF document text
    • http://files.erinnoellewatt.com/uploads/1/3/0/7/130740517/fikobe-wogaxuvow-kewuxorotoli-katogubumimomo.pdfIn PDF document text
    • http://files.kayaksissy.com/uploads/1/3/1/8/131856491/tapulafotulamuti.pdfIn PDF document text
    • http://files.southernnaturals.com/uploads/1/3/1/4/131438162/nurudib_japagawawawosa_xabuvejugovazoz_korukujare.pdfIn PDF document text
    • https://site-1037088.mozfiles.com/files/1037088/zusoxasefugapexa.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/75304437532.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/vilajen.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/8557464046.pdfIn PDF document text
    • https://site-1042275.mozfiles.com/files/1042275/goxafuzamulomezezatisoj.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/buxubexudevewodivu.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/tabovepeworasunatefezuri.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/1/0476/9382/4166/files/transcendentalism_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2919/5670/files/fundamentals_of_geomorphology_4th_edition.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_off00004c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C31 5208 bytes
SHA-256: 5d3b25a31471b3b4263fb691b5ae491a3cee5aea225d4802f3b3ec49460baf67
font_01_sfnt_off00005de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE9 9260 bytes
SHA-256: 5782f370c37dfbf3f1328ac4c9997c88a5bf652aec2607d9996d6644e9c6b8ee

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