Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea55efff7718e0a2…

MALICIOUS

PDF

41.7 KB Created: 2020-11-06 21:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0967dafda2a8f9a6251144a84546ef02 SHA-1: eda383bb7000212e23aed7f3ab254bbd856f2fde SHA-256: ea55efff7718e0a243504badfe3721e226e578eacfb35408b265f30e8b39567a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains embedded links that redirect to a malicious URL, which in turn leads to a credential phishing page impersonating eBay. The ML classifier strongly indicated maliciousness, and the heuristics confirm a brand-impersonation phishing lure using an SEO redirector. No scripts were extracted, but the document structure and embedded URLs are sufficient to identify the phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/4689266.pdf.
  • 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=n64+mouse+ebay PDF link annotation
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/4689266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f97daae61904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5f95e5caf20ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f894c5a20899.pdfIn PDF document text
    • https://tupipukevoluda.weebly.com/uploads/1/3/4/0/134041298/9a69763ab825de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8a92c58b9e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5fa1e26077fea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5fa42014e88ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zopifigife.files.wordpress.com/2020/11/82616461740.pdfIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.pdfIn PDF document text
    • https://zizugojos.files.wordpress.com/2020/11/15502229161.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/74717649807.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/74190272412.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_off00006602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6602 5156 bytes
SHA-256: 24db3d77e53ac371845ac74d21aaebc06949f73f0de002e2e6a1a10c8a8b3dbc
font_01_sfnt_off0000778e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 10224 bytes
SHA-256: 3edb68fbbeb2ce8eb24c42081dbd331aebc637869f65c11b179a42f8ae411788