Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54ab68bccb9dbe7…

MALICIOUS

PDF

34.5 KB Created: 2020-10-04 01:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 329e836feed95b21c8f938356ee9ce23 SHA-1: 54153e29fe236eefc86a9959c69712056047b14d SHA-256: f54ab68bccb9dbe7dec64bb7dfeab79910c2a2d7281560087184f2a440af1cfb
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://gettraff.ru/strik?keyword=blue+planet+world+biomes+webquest+an In PDF document text
    • http://nugiw.extraordinaryed.com/uploads/1/3/1/4/131454046/1360669.pdfIn PDF document text
    • http://files.counseling4less.com/uploads/1/3/0/7/130775677/joforojuri-daxatide.pdfIn PDF document text
    • http://files.gladeviewtowns.ca/uploads/1/3/2/6/132695493/vizejemusi-bamifazeruwo.pdfIn PDF document text
    • http://files.cruiseandtourexperts.com/uploads/1/3/0/7/130775504/76bfcc6f23a44.pdfIn PDF document text
    • http://files.upinsmokeonhill.com/uploads/1/3/0/7/130739779/6698742.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/1/0430/5901/9933/files/discovering_computers_2012_chapter_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1164/3304/files/81597772940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3118/6589/files/girovuwepijuxesanesimevil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6861/6611/files/defiant_dual_brite_motion_security_light_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/magapufikonegegusikakiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5686/5173/files/54360354756.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_off000047c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C3 5512 bytes
SHA-256: ca62d92c4f694cae6a431f6fa2fba5889a42541ae42987b577755e13e794cdf6
font_01_sfnt_off00005a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A71 10240 bytes
SHA-256: 293f234542a1796335173f1d87f9d600c3b68d12bd4127b193cbbd805c97fd20