Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7939da89e625cdc…

MALICIOUS

PDF

41.5 KB Created: 2020-11-06 17:10:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3e4093e86d0c91631b61bd151ed2e8de SHA-1: a6d87957db3250206411c53fc27523b7c71be865 SHA-256: f7939da89e625cdcc466e16d5225ed90976983ef4069896b14fc8ea0b9a1dcb8
84 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffi.ru/aws?keyword=dell+s2340m+spec PDF link annotation
    • https://dojumavuj.weebly.com/uploads/1/3/3/9/133997280/dekunekigukor-linesit-talafovagotipez-pamafupozipiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d677f213-4116-4814-85c1-d229e83123a3/makigodavuburelapinul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20a8b42-4078-4787-b702-17e7bc2fb4a5/risumore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05be1fc7-c794-4811-87e1-72073e7addd3/examen_cotorra_secundaria.pdfIn PDF document text
    • https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b821cd5-d8fd-4bcf-b11e-39d715400bbe/honda_fury_review_2012.pdfIn PDF document text
    • https://dodumadano.files.wordpress.com/2020/11/rudululufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e122cfa3-4daf-4c80-9a55-4377157d8ac4/nejuzowigozexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932462aa-525c-4ff4-889d-30c653699c2d/47108153936.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/jajewuwun.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_off00006324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6324 5296 bytes
SHA-256: b19e421b0a01340df12243ec33c6bde0bd9ee4b789f0b8e6fa1dcda83e63947f
font_01_sfnt_off0000752d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 10852 bytes
SHA-256: d6f52732db8820bf7fddb1c66bea29826503fc0852da2dbe808f5e3581f3d67b