Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4a2c7237fc71c1…

MALICIOUS

PDF

73.0 KB Created: 2020-10-14 09:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: b7d273719b012ce73a03aaff6217a0d3 SHA-1: dc2ec3ff1c7707c1a948309fc7512894bcbb8f96 SHA-256: 6e4a2c7237fc71c18ebfe41d3c5ae771df42f9833c1470e7af07a6cff78bdfe1
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=%25D9%2585%25D8%25AF%25D9%258A%25D8%25B1+%25D8%25A7%25D9%2584%25D9%2585%25D9%2584%25D9%2581%25D8%25A7%25D8%25AA+apk+mod In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.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/1/0430/0872/1049/files/union_pacific_timetable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4669/8649/files/sodolesekuxuduzidiveliva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9953/7566/files/high_schools_in_lafayette_la.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/erie_metal_roofs_pilot_program_scam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8759/6182/files/xosuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/avogadros_gas_law_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/school_bus_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/73053958010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/reglas_basicas_del_voleibol_con_imagenes.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000dccb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDCCB 31484 bytes
SHA-256: 85debb80000f62453e8230453b9bd587fbfe23e308264955f9f6f2b8c646f640
font_00_sfnt_off0000931b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931B 4768 bytes
SHA-256: b6891a8f28f8f44fc1af2a5a64734f5bfdb87c08387b229f48196a6d1da01685
font_01_sfnt_off0000a33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA33E 17200 bytes
SHA-256: 1b7e944e7bb9584886ec3cf99ddb182176264d6a5f02139b6ffed9d33e3f15fc
font_02_sfnt_off0000bc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1D 9488 bytes
SHA-256: 043edff6620086b33f4737d7ed954cfa751a6c978dd7c65e31e5de0621225293

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