Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93d40b2278fbbac…

MALICIOUS

PDF

34.4 KB Created: 2020-11-06 14:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 6ff91aaac5b8f790a76b0dd41e3a91e5 SHA-1: daa05ce2bab8c57c1becfed78028a173f1d955dd SHA-256: f93d40b2278fbbacafec55443803ddb433c861db60d958e16b66ed773d664d58
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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=energy+transformation+worksheet+pdf PDF link annotation
    • https://walasopi.weebly.com/uploads/1/3/4/5/134588780/6914858.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/wupusawokisexomuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5f984ddcedac4.pdfIn PDF document text
    • https://migufakugiguxob.weebly.com/uploads/1/3/4/5/134579218/1372869.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/gafajogijezim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f891e8881f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8a688407b05.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/bitizopovopaso/85379577025.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/minecraft_redeem_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/fiwegofevolawofimon.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_off00004782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4782 5640 bytes
SHA-256: 23b60037cc1481b5d5f60357bb7a89c6e6d83231f781aadae3d843ccf205c931
font_01_sfnt_off00005aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAE 9968 bytes
SHA-256: 0dc1ef8b16cc1a56cd23dda40f9acc6cf100a07f17ebfa13658eb3f5a9a0714d

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