Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e908ddd0bba9f03…

MALICIOUS

PDF

47.8 KB Created: 2020-11-09 15:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 33659705d761f510a2a2cdbfd1093c7d SHA-1: ad7c2984a499e1df4aa6c47f7e0342d620a56cc8 SHA-256: 4e908ddd0bba9f033605758f8e1ee13edf3e70de948144483b28beb7c20d2528
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffmen.ru/aws?keyword=nyc+flip+tax+percentage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f92858e4fe5b.pdfIn PDF document text
    • https://veminimuvaw.weebly.com/uploads/1/3/4/6/134630651/9492968.pdfIn PDF document text
    • https://kivojiwivumupu.weebly.com/uploads/1/3/4/5/134597008/febozoraf.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/pomaxa/14821922143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab730c26-29b2-44b6-91ea-4c6c8190ea2a/52126536397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14743d19-4518-4644-a313-22b039bee44a/ninol.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/rageselugipepisazirub.pdfIn PDF document text
    • https://s3.amazonaws.com/mupudipuvo/zosukirigusile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c47dd97-5c67-4a60-a0d7-9893b628f9ba/batekopevefe.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/antardesi_patra.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/velocity_of_a_wavelength.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000962c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x962C 18068 bytes
SHA-256: d57514e25d6da515384a7448b1f7373f07b39dc11e92665a9997cdbf7cf96a5c
font_00_sfnt_off00006045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6045 5144 bytes
SHA-256: 45cc918307b3890cc433c667f7ef8cad7ccb55be7fe5bf4d4bc8e884cf9c7532
font_01_sfnt_off000071f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F7 10596 bytes
SHA-256: 702d204285d2edc4ed13c2f7b20727151893e47cd1c0017ccbfee09cd57f4528

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