Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42e7e486ca39986…

MALICIOUS

PDF

53.9 KB Created: 2020-10-29 22:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 63ec1cb49109aa8efae90630a2c3033b SHA-1: e1b47f202598e1a930b249b6ff7fb9b77375ee43 SHA-256: a42e7e486ca399867282ecd3f2cc0348c8626b849399d5b1aa3ce6020a47bdb8
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://ttraff.me/123?keyword=nba+live+mobile+coin+generator+no+survey+or+download In PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/bisub-takona.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/miniban.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/0b59beb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f90cecb0a403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f8dad1528858.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/vekewisinonarege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/solomon_islands_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8660/2943/files/normalidad_quimica_exercicios_resolvidos.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/flatland_by_edwin_abbott.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/roland_barthes_image_music_text.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/supernatural_comic_con_denver.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/concept_of_social_movements_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/paytm_all_promo_code_list_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2192/5543/files/6700052264.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/lapagewus.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_off00007b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B17 5624 bytes
SHA-256: 70524be54ca312e8bbaa10e338e75e117123dbb1f49e6ed9d40746b0231132bf
font_01_sfnt_off00008e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E36 11480 bytes
SHA-256: c62d30c2fc601cca2c7dd2e4dcdcd00809f7ca0590133ae8b9eb980a9e94aa0e
font_02_sfnt_off0000b44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44F 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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