Malicious PDF — malware analysis report

Static analysis result for SHA-256 59df839126eca7a6…

MALICIOUS

PDF

42.1 KB Created: 2020-10-30 00:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 402240763efc9a521eb92b279bbcbbb0 SHA-1: d230a5dad47f69f6fbae86d22e369fa794152b26 SHA-256: 59df839126eca7a6594a46e701f147906d285b6fe4193895c4454dfff2a6a16f
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/aws?keyword=blanket+answer+800g In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f94d36b63e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f88055be6e6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006671.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006671.bin)
    • https://s3.amazonaws.com/nowokil/vaders_apk_fire_tv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6065/7828/files/lonadilefob.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/pinele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/ssc_hsc_result_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/16837905113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/6602/0766/files/the_anarchist_tool_chest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5763/8307/files/88672614018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6949/8032/files/zurunevup.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/duxojenusegopojetil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/sega_genesis_emulator_apk_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/brother_he1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/sixaxevamukasabelelorojed.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/free_color_purple_worksheet.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 extracted file (font_00_sfnt_off00006671.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 5392 bytes
SHA-256: 83312fffdc30f4272aa63c9bba9fb38d4104cc5e73bb389c5585b9ac344fe905
font_01_sfnt_off000078f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F4 10288 bytes
SHA-256: c1ef1c79be021d5531fd1f546f3445a06495407e0e073f9a4a232da7a95fe135