Malicious PDF — malware analysis report

Static analysis result for SHA-256 209cab0ab42ec933…

MALICIOUS

PDF

68.0 KB Created: 2020-10-25 20:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c98249f40f094cca59556abba4dbe96d SHA-1: 08bb2c5ccd647b70031ad1f3f764a8b049af7945 SHA-256: 209cab0ab42ec933417b90da1be2be5561387bb554dc5e647f4df11857c73284
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ttraff.cc/pify?keyword=electrophorese+de+l%2527h%25C3%25A9moglobine+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f8abaea31c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f93032ab0f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f883c844c659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5f90b24a96f7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f8901b2ef70c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_5f95afaf3c7f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5f94c15a6f801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f8fe9cb3a287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f93c9fd274df.pdfIn PDF document text
    • https://fogajabewe.weebly.com/uploads/1/3/4/1/134131707/4947368.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/786202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3540/8576/files/nefita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2186/3582/files/ficheros_en_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9390/5575/files/46322503818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6522/7432/files/four_types_of_sentences_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7488/2198/files/11917791589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6694/5447/files/18168325607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4361/7958/files/60589643306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5712/5789/files/56529967194.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/80017067957.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/8903411171.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/42696220674.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/ardhanarishwara_stotram_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/buffalo_wild_wings_menu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 5420 bytes
SHA-256: 7434071069bc90d35b0f6e1217914e83604996736f9383698e080b919836b6f8
font_01_sfnt_off0000c5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F2 13860 bytes
SHA-256: 888727dbca96919211262f0359d14d631d0f6119c4ba11630b52f71edbd72691
font_02_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e