Malicious PDF — malware analysis report

Static analysis result for SHA-256 1020870ad1ca3239…

MALICIOUS

PDF

42.1 KB Created: 2020-10-31 01:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6c28a5c40a0be25f9b3d04391dac9dd7 SHA-1: 9a8204cd47c5fc30affb249c136e5bc14f5905ea SHA-256: 1020870ad1ca3239a0d32dcca69365e25f499f6d624528279708ccc4dc034d81
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://cctraff.ru/aws?keyword=walmart+my+schedule In PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/3523552.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/bipesavavinut.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/wejewajo-zakumozidari-tuxurowoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f9a86de15368.pdfIn PDF document text
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/30e82cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5f95d2d6a14e9.pdfIn PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/5004988.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006522.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006522.bin)
    • https://s3.amazonaws.com/henghuili-files/gagezuzekodanimogezej.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/barbie_printable_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/antipsychotic_drugs_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/south_african_banking_industry_analysis_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/xivutexumolupagumizojuk.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/toronto_attractions_map.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 extracted file (font_00_sfnt_off00006522.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 5292 bytes
SHA-256: b52c6a063f11f68aac38fb94919b08d4e33540fced87e47091a48ef9d8b0c694
font_01_sfnt_off00007705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 10804 bytes
SHA-256: a834e19653a2a6f37b8a4968b38e3cb13dc6342e164b1ab68f6560e11e22dc31