Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7bd2a5b5077c2a6…

MALICIOUS

PDF

71.5 KB Created: 2020-10-10 22:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca4a2e3e336ee354030d837a3a193749 SHA-1: e300b67714816608153aabfa18b48598811f113f SHA-256: c7bd2a5b5077c2a614be2199cd27ffdd1af3a11be750a23e4c7a13ab644e1e14
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/pify?keyword=town+of+needham+tax+collector In PDF document text
    • http://gisaxes.aaronsweed.com/uploads/1/3/1/4/131437753/81ccfc8972.pdfIn PDF document text
    • http://lijiniset.breescircle.org/uploads/1/3/1/3/131383982/vuvibepagux_finevutabuw.pdfIn PDF document text
    • http://popixe.soilandsun.co.uk/uploads/1/3/2/3/132303320/6088485.pdfIn PDF document text
    • http://vigez.cockatooparkmorgans.com/uploads/1/3/0/7/130740235/93828.pdfIn PDF document text
    • http://denupob.davidstraange.com/uploads/1/3/2/7/132740930/3978507.pdfIn PDF document text
    • http://files.kodivarosiberians.com/uploads/1/3/2/3/132303013/e4d84407cb34306.pdfIn PDF document text
    • http://lizalal.rachelhenson.com/uploads/1/3/1/4/131453960/wimupibixozotet.pdfIn PDF document text
    • http://files.fishinglakefirstnation.com/uploads/1/3/1/3/131384142/5617448.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/xakapelipuba.pdfIn PDF document text
    • https://site-1044076.mozfiles.com/files/1044076/33081008416.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/34696571360.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/1/0438/1055/4013/files/34182560994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8392/7194/files/vidant_wellness_center_prices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/donde_esta_santa_claus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1965/7635/files/average_beach_towel_size.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_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 5192 bytes
SHA-256: 0070ab14a2cb98d352d22fc0bfbfe7ee8a0027bd2a3274bb43f2e698ae53b4c8
font_01_sfnt_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 10180 bytes
SHA-256: 7ac80c2274e278758a8a8d844b66d93f2b05e2c23dbe9056eff9fd221be6c430

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