Malicious PDF — malware analysis report

Static analysis result for SHA-256 609369f3018f18fa…

MALICIOUS

PDF

41.7 KB Created: 2020-10-04 10:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e19b16bde8eb1b3f5f16c6eaf4a3c332 SHA-1: ea23c845877d79b171ddffa117bd27939a1bd22e SHA-256: 609369f3018f18fad4ea5fdc04723f7cf2dbdf2f7d333eb470ba2c7c929a8bf8
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://cctraff.ru/strik?keyword=metaphysical+poetry+penguin+classics+pdf In PDF document text
    • http://files.bayridgerescuesquad.com/uploads/1/3/0/7/130775850/707819.pdfIn PDF document text
    • http://files.jennikaroyce.com/uploads/1/3/2/8/132816066/mununis.pdfIn PDF document text
    • http://files.menefeehamps.com/uploads/1/3/1/6/131607075/dutigowadurub-totakasopibimoz.pdfIn PDF document text
    • http://purok.ugaswimanddiveclub.com/uploads/1/3/0/8/130874038/3b86cc4063897c.pdfIn PDF document text
    • http://files.arthealswarwounds.com/uploads/1/3/0/9/130969158/tokibafaninakip.pdfIn PDF document text
    • http://files.kathleenmillar.org/uploads/1/3/1/4/131407890/disuwamotafekur.pdfIn PDF document text
    • http://watere.susannealmoore.com/uploads/1/3/1/3/131398244/parufufipip.pdfIn PDF document text
    • http://files.wildswanretreat.com/uploads/1/3/1/8/131872269/gixuvomerexurakux.pdfIn PDF document text
    • http://maxumul.tandooripalaceoxfordstreet.com.au/uploads/1/3/2/3/132302987/kuzedegipigokun_kevigi_bisegi_tuxuver.pdfIn PDF document text
    • http://files.theurbangardeninitiative.org/uploads/1/3/1/3/131380158/sazedofuli.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/1/0486/2047/0432/files/maiores_cidades_do_mundo_territrio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3361/1418/files/16335021733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/how_to_install_showbox_apk_on_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3283/6768/files/jlab_wireless_earbuds_bluetooth_pairing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8268/8928/files/presbyterian_health_plan_medicare_advantage_for_2020.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_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 5524 bytes
SHA-256: caae1d6cc18a6951cb9d64667c15ba02bce2786114c43036bdb3a3951a4b7c83
font_01_sfnt_off000076be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE 10272 bytes
SHA-256: 110c5ae31cc8951312df325bc84c18be24b69c857d1f7969caece733843a750b