Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedf88c98fed702a…

MALICIOUS

PDF

49.3 KB Created: 2020-10-02 03:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 45292ebcb6beafa487f2cccafa6d9015 SHA-1: e73975a9c6824bfd9b1e48a0367fe40f97e49ade SHA-256: fedf88c98fed702afddf221c619c665d9ea96a2f97a89301e9409d8ff3a7b679
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=manual+balance+sartorius+te214s In PDF document text
    • http://motalu.merrillsoccer.org/uploads/1/3/1/8/131857243/d3d91c1f501f.pdfIn PDF document text
    • http://motut.christiestimber.com/uploads/1/3/1/6/131637432/34162.pdfIn PDF document text
    • http://files.ststeves.com/uploads/1/3/1/0/131070131/nibino_tumanuxadu_wenugafefeg.pdfIn PDF document text
    • http://tuvaru.globalacademicconsulting.com/uploads/1/3/0/8/130813592/jakodikaxe.pdfIn PDF document text
    • http://files.nataliezervou.com/uploads/1/3/0/9/130969097/nupapolu.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/1/0470/8889/4110/files/kafag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10f7b98-2ed9-4084-a8fc-73e60b701041/wugunilegubibutapikodiwar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c235a3-5100-4152-957c-a3df6ca0f102/timerodagujeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1795/6260/files/89697832811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2083/1904/files/tipos_de_termopares_e_suas_aplicaes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/sioux_falls_schools_masks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/playcanvas_games_unblocked_flappy_bird.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1586/8063/files/wopavawidonavabis.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_off000078cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78CB 5208 bytes
SHA-256: 62c9e74417c590be8b48388f2ac649a3a88518430f97c8de2dbf442aca3adfdf
font_01_sfnt_off00008aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA3 14396 bytes
SHA-256: 4d20f42e96fd1946bc90e0dcc9ee31feb6a59a6ff90b2103f1ad85dbd7b4f045

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