Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5996bc8558c5131…

MALICIOUS

PDF

44.5 KB Created: 2020-11-07 05:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 6c4c3679f7dcfb834268dfe982d43a00 SHA-1: c4be99fec6bdd68674c4869b31dfc456c7d5b3d9 SHA-256: f5996bc8558c51311f404ec0b91daf0fd773fdb668e48bf0e84b9cefff38e2e8
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?keyword=egg+osmosis+lab+answers+life+science In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f875714c9aa2.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/bekukuvave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5f8a5b12820f7.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/8827080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5f9dff04b639d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f90ab20b1006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fa5f945e5c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8720e6ad7f8.pdfIn PDF document text
    • https://muxosafexokole.weebly.com/uploads/1/3/4/4/134485240/jiwopazuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_5f9815a9b9160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zidisoxe.files.wordpress.com/2020/11/gentlemen_prefer_blondes_streaming_sub_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/walmart_stock_prices_today_price.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/small_converter_to_excel.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0D 5392 bytes
SHA-256: dcf0ba9f1dd99fad1ca55e53ef029e10a408c960ab021f4dd6c9d424e4923907
font_01_sfnt_off00008167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8167 10604 bytes
SHA-256: 533f395bbcbd08752263ed172074def6e79b8068f1c42fd55e876b7fd46456be