Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac089f9bad26a124…

MALICIOUS

PDF

55.4 KB Created: 2020-10-03 02:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7052d6a300bce75fa0c37c98078a8945 SHA-1: b951fc9bc932f68f13b212d916ddd780531332ff SHA-256: ac089f9bad26a1241738b1018baba88c2dbf89d1a453d4ff032bdf4d000258f3
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=bismillah+in+arabic+calligraphy+text+pdf In PDF document text
    • http://files.blackcatmovement.com/uploads/1/3/1/8/131872178/pibufitelipavafo.pdfIn PDF document text
    • http://kalinow.hollandelementary.net/uploads/1/3/1/4/131482975/2346985.pdfIn PDF document text
    • http://navobubiw.consulateofzambia.org/uploads/1/3/1/3/131383657/1198224.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/tikos.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/bemapuvarebot.pdfIn PDF document text
    • https://site-1040563.mozfiles.com/files/1040563/fepatunovuwo.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/1/0486/2040/4894/files/mufobepope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2757/5196/files/atp_activity_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/0654/2243/files/riwovegakejexomezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6292/6229/files/88335579449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9296/1189/files/pejisupoporirowefaloni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9895/5684/files/rudolph_shiny_new_year.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/6402/4229/files/analogous_structures_definition_and_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4703/4784/files/64741563030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1505/3213/files/fupizadagevetifenuwijuwo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000734b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 5928 bytes
SHA-256: c30153d346e6f4510a652ef459d342785d5abbc881c4478633346ed21f934c9a
font_01_sfnt_off00008755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8755 10592 bytes
SHA-256: 1d78f772c904598b1f719e8e4f8138c2df8f70f42805513196f0148fa865cb97
font_02_sfnt_off0000ab38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB38 20628 bytes
SHA-256: f127603d27891a474650c0659948c878c32633f2ece4ca9e9c0fed3eb3f84ba1

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