Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8e79f3205e61b1…

MALICIOUS

PDF

40.3 KB Created: 2020-11-09 07:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 7ae329f7ad50bae343e1ff68aa501275 SHA-1: a085bbafb3acd8014fc71b58b8d5b4ffe2139856 SHA-256: 4a8e79f3205e61b172358329d543f984820286abff9fa010168ad929f2fc7594
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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=itunes+my+files+apk PDF link annotation
    • https://tuvomirunasoz.weebly.com/uploads/1/3/4/3/134324776/laxegude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5fa35aff56fc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5f970bcb314e7.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/1141464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f9e8c246fec4.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/4101908.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/logape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5f8a84b5c09e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f8f48085b2fe.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/ad2c7b1a-df54-432e-a531-e4faee00ae83/place_value_chart_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72661a20-7a8c-4ded-8641-c17b38304753/66575605398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0975022c-ad90-4437-8b9c-82198eede7ad/70987989282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3610f4-16b9-4295-8a3d-1f874f70f913/sozosexojedokas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/513be642-cd3c-490a-ad95-cf1456f7e32c/48318600833.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/71367721402.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_off00005e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9D 5056 bytes
SHA-256: d0cdde18ae9a205bbde1f7055b0996d2db7bd08f0a1f8261368a10bee217cc4d
font_01_sfnt_off00006fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 10724 bytes
SHA-256: 08540ee376e90052c9fa8a4ca5f6d4db6d46dbd11daef7f9854cf7eeb5444a48