Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab97573e1d119562…

MALICIOUS

PDF

42.2 KB Created: 2020-10-11 09:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bb7da315fadaabe088e6c0589b703d3e SHA-1: e5300c129378c4af885a3ebc90835e5895184e4f SHA-256: ab97573e1d119562428bc83e5c73d6a52d96b4d1e3a2ecd56a0772bae75d79d4
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://ggtraff.ru/pify?keyword=which+of+these+questions+can+be+answered+using+scientific+methods In PDF document text
    • http://files.padovecote.com/uploads/1/3/1/4/131452982/mamugufukopebax.pdfIn PDF document text
    • http://files.playersclub751.com/uploads/1/3/1/0/131071299/9102995.pdfIn PDF document text
    • http://lutiv.briggsquarterhorses.com/uploads/1/3/2/7/132710621/penupilarixufu_rofudosen.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/1/0483/7113/8711/files/87053166856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/vimezuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/4184/0293/files/neverwinter_searching_the_present_cant_find_documents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/64824839755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/24821463370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e69b1c-673f-4c72-9588-4b1bf1050b7a/dimuzixafidezuvefevar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0821a02-1fab-49f2-9c9a-92cfeb93a2f9/bafesisofemudevetege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452bdd10-f72e-49ae-a681-5f93aa8de151/biwiwuked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/learning_is_fun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/wururakusuwabunefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5813/4168/files/muguxibuvipitoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/body_worlds_boston.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_off0000638c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638C 5776 bytes
SHA-256: 5340624dbde29b9d6ed5fbdc83c9842091369ac9e4b84009259e3f1df42e275b
font_01_sfnt_off0000770f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770F 10608 bytes
SHA-256: cbf7f6d01dc8d737bb4e567727571ae2de9cd771d9ac6ca03ea8a0e632bc4b47

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