Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6ae807d1badd4e…

MALICIOUS

PDF

72.6 KB Created: 2021-06-12 01:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: db6cbb0c78ba45c50feade28b5e4d0b0 SHA-1: 0b0c7f61db22fb9b5137c224aad7805da9be32c5 SHA-256: ce6ae807d1badd4ed1cd087026c1d3b29795698393a10d5cdabf1bc5414796e2
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a malicious SEO redirector link, specifically designed to lure users with a 'free-download phishing' lure. The embedded URL, https://archism.ru/pbw?utm_term=tamil+new+movies+2020+isaimini+download, is a primary indicator of this malicious intent. While no scripts were extracted, the ML classifier strongly flagged the PDF as malicious, supporting the conclusion that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://archism.ru/pbw?utm_term=tamil+new+movies+2020+isaimini+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5fdf90aa8a9e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5ffe0147e50d0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4413862/normal_60b379df1099c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377128/normal_600212b9b33dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_6042e01106dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_606d8d0ebc1c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5ff849dd4299c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_6016ff1f27d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_60495fbf237d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_606e28651109f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4408343/normal_60b00434083bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383571/normal_5fc9789a91e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_6021a29b2a081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisagexal.pbworks.com/f/introduccin_a_la_metalurgia_fsica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015c14a3-07e9-4f0b-a2f6-c9fafbd7c1e3/difference_between_peptide_hormone_and_steroid_hormone.pdfIn PDF document text
    • http://wekanivu.pbworks.com/f/ramaiya_vastavaiya_full_movie_watch_online_hotstar.pdfIn PDF document text
    • http://zolunegoli.pbworks.com/f/kujozilisamumoxegimuribel.pdfIn PDF document text
    • http://puzavofan.pbworks.com/w/file/fetch/144728880/metilosetizoli.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/f/descargar_plague_inc_full_apk_2020_android.pdfIn PDF document text
    • http://lawerusemepe.pbworks.com/w/file/fetch/145161624/sovameniweparatulip.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/acids_alkalis_and_salts_crossword_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a95c69-2780-441c-ae69-ac25ed2bba5f/88180721033.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_off0000df19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 5248 bytes
SHA-256: dcd7f92fdbf46f59d77bbe5de7856ec4d5f267da7a618a676ec27eec2da923ff
font_01_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 10740 bytes
SHA-256: b4c38bc14b10d83b9d3052a7b416bb9423416a99deba3ea53c96172d838413c0