Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c24ecd81e603a3…

MALICIOUS

PDF

58.8 KB Created: 2020-10-26 08:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5dda549796ad7085f459f769a9cdc0c1 SHA-1: ef81526f40010eb2dcb6c8f7677f1609364499c2 SHA-256: 47c24ecd81e603a364085aab7984766be2fec9c361a052f2af24b430bba7eca1
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=tanzania+a+level+biology+syllabus+pdf In PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/lesakuzivosezuz.pdfIn PDF document text
    • https://roxexiku.weebly.com/uploads/1/3/4/4/134445291/zevepokarilamed.pdfIn PDF document text
    • https://vaferomesab.weebly.com/uploads/1/3/4/3/134351928/warazifokepo_minasadugiz.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/7867a755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f9227c92c861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_5f95bdbac4f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f8a4081dca3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f91a6e9dafe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f8d9b485f9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8df0659d454.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/satudifin/jakowowajapuxewoxewi.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/7260790507.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/cattle_feed_ingredients.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/keto_cookbook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/50673350044.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/gerozovumadan.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/indian_astrology_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/80637826477.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://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 5412 bytes
SHA-256: ee55d941a3b03efab043d6f96d4a8c4f0758c8c896e859fac55872b066595fbf
font_01_sfnt_off000073c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 18152 bytes
SHA-256: 002bbed7c9648e3d7a4eee95b7f089bdc371e68e4b8267d7311380d147d64c34
font_02_sfnt_off0000a402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA402 10640 bytes
SHA-256: 31ff84d321942ec898f528872ae0470e3744b15a3f81c2b97083547e6ccc87e7
font_03_sfnt_off0000c877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC877 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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