Malicious PDF — malware analysis report

Static analysis result for SHA-256 149f6e4b7fced803…

MALICIOUS

PDF

46.5 KB Created: 2020-11-06 02:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 4b63e54d611f6fff783154d329b9d6b7 SHA-1: 93b3a342d9b5ff3ebf4338d346c9609ed0684a15 SHA-256: 149f6e4b7fced803b602283fb3b2f31ccc4a1a8ebc44a0a6beb9c470ebbb95b7
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/123?keyword=prentice+hall+algebra+1+textbook+answer+keys PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fa18b8b7a5c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f924bc9259da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f945423203bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fa31f7c1eb9d.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/6341600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412778/normal_5f9ee89a4f6e0.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/zubudozamepo.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://uploads.strikinglycdn.com/files/daf6b172-e71e-4805-a5d6-adea66b70e35/67238213086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fb08f4-a014-4eda-8377-cb87b0cb0d58/sittin_on_the_dock_of_the_bay_vocal.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/alexander_the_great_essay_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44360389-eecd-4027-bfc8-2034177b5e43/ludoweb.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/valley_point_elementary_school_dalton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75fe378-472d-4a1a-ac4f-f15b3122ffb2/9035055990.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_off00006839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6839 5368 bytes
SHA-256: 03739709ded126e5b537ca4faa0759d025b9434574d774522fe0430362ef1ab6
font_01_sfnt_off00007a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A80 10616 bytes
SHA-256: ccb5802edd8cbd90e53df6ceb31fcb277770343044da5b031a244c9068d28925
font_02_sfnt_off00009e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E98 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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