Malicious PDF — malware analysis report

Static analysis result for SHA-256 79eeab0155b33118…

MALICIOUS

PDF

46.4 KB Created: 2020-11-05 21:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 769b9a23fa96ef528da7d68820168d98 SHA-1: 0410eb1bd6318127f9eea3b2caf14972e2554bd1 SHA-256: 79eeab0155b3311894d7a7a474b1f7ec89d77f67014ab1d3de1842d3c6f80f71
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=briggs+and+stratton+repair+manual+273521+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f87db8982aed.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/mibatekuvakas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_5f9c4fd5bbe02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f9ca97317a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f926f7e39660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f9a8013f3864.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/jikanowafepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f9cf907a0e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5f8f6919a8c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5fa3b277df776.pdfIn PDF document text
    • https://fofaxofik.weebly.com/uploads/1/3/4/5/134521529/6c9a6413fe7f.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/1484213.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8642/8324/files/sulelagudatululivulugi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 5844 bytes
SHA-256: 228a8d8a0d63375f21db67858b547ae7588aa85575e44ebda3b35f08c1556e50
font_01_sfnt_off00007838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 11252 bytes
SHA-256: df45ec0d051a4e8f0c0eefeeb492185a67eeba38da64be9c9e4b0ce3f676a596
font_02_sfnt_off00009e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E87 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e