Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b1a3d223abba8d…

MALICIOUS

PDF

50.7 KB Created: 2020-09-29 22:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9d91bd1ea35edc4101ce7dc85e86ff9e SHA-1: 6a14a8e4bd842cf05fe5c356d2aa9c74aff9bfc4 SHA-256: b7b1a3d223abba8d51d14248ea9f82ede83cc21c176247f78985506ddc7415ca
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=bullwhip+effect+adalah+pdf In PDF document text
    • http://files.jasonacoombs.com/uploads/1/3/0/7/130776338/mofavu_xakaf_gozerazopikupor.pdfIn PDF document text
    • http://files.vibrantabasolutions.com/uploads/1/3/1/4/131482962/fugamoliboxavuso.pdfIn PDF document text
    • http://sepefikeg.erminsinanovic.com/uploads/1/3/1/0/131070198/wavojomirorolilut.pdfIn PDF document text
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdfIn PDF document text
    • http://mabawusiz.sydmocreativeco.com/uploads/1/3/1/6/131606457/nonuminusasoxo_wepoxasagavu_wimolu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d9b55b-eb51-4fa5-8fd7-675c53f0626f/96587113394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3de9130-c89c-44d8-9ce4-a4f7cb7f9834/watogexijopunaraxexuvire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc662f1-b1ac-480f-817c-77b94eceef7f/5222296791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc47468d-dd39-4914-99ef-f3059eebe6cf/14358467159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5112fd9b-435a-48c3-873e-ddc2d7be6121/gabejemukogiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/annual_report_2019_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2614/3639/files/cult_of_personality_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9058/2427/files/xepil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/gosapinimokuxumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/wogegokif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/cateterismo_cardiaco_en_pediatria.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_off00008844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8844 5112 bytes
SHA-256: ee7cc9e9f5ad01cbed5bbeaa8a04f24bdc6eefbb01142089e8fe09fe0b190c7d
font_01_sfnt_off000099c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C5 10592 bytes
SHA-256: c26980840eea99b43c0f8b514364893dd51ff682f29b8e5ea259b5e0c0ddbd70

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