Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ea4f4fcf089c00…

MALICIOUS

PDF

34.1 KB Created: 2020-10-31 22:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 6d57b74ea15c27c6b07fad43fedcbe84 SHA-1: 291cd724abd33b43418c057f489209a8392723f1 SHA-256: 14ea4f4fcf089c004d124184784432f6f4e60e85105863b59d056ea4c93ab0cf
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://ttraff.me/123?keyword=i+understand+that+reference+gif In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413987/normal_5f9c3f5f3ab71.pdfIn PDF document text
    • https://pesodubebugi.weebly.com/uploads/1/3/4/2/134234841/lumununezur.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/592a9ee0c4e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8f36db17c81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f8755adb96cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_5f9ae2b55fb2d.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/dodobapur.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/3211673e32aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f8de9a6a7c30.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/xisilebisisod.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/henghuili-files/95383746076.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/fasejuwadebozifozotejew.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/83332649576.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/25630420186.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/free_makar_wind_waker.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/diagnostic_nursing_manual.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_off00004860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4860 5188 bytes
SHA-256: 5cc40b070afe36788b8fa4040044447c9bed1197b99a3acb7fcb6ef9a95e7bbe
font_01_sfnt_off00005a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A02 9728 bytes
SHA-256: 26e17811383360e19a89205d4057c23c6d92b56674535efbd4b89cbbed681ed6