Malicious PDF — malware analysis report

Static analysis result for SHA-256 7758e0a56c7aed70…

MALICIOUS

PDF

42.9 KB Created: 2020-10-17 21:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: bc08425d199eb32dae6cfb00f2428947 SHA-1: 216e4461968c66a77bd840f906a41687a9d7e081 SHA-256: 7758e0a56c7aed70b1dea65777c57ba914a14718787c7560a5f23074f88b6d80
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.com/123?keyword=lego+technic+instructions+42058+and+42059 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5f8a72cfd87e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f892d87ed820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f872ddac2c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f877e43b4701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f87c1224afea.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/a8c5456bfbd.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/rozin.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/4764905.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xejofereg.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/rawexupeladujefi.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/lenosovazikatek-watozokisa.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2471/9261/files/history_alive_6th_grade_study_guides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4286/5820/files/the_grand_winston-salem_frozen_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8979/1643/files/pufapefasigiwotar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7847/8743/files/57900089708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1261/7926/files/virulence_factors_of_acinetobacter_baumannii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/rujesudovorogar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/charlas_de_seguridad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0555/4083/files/self_confidence_printable_self_esteem_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/pefilodigikozobo.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_off00005bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC7 5944 bytes
SHA-256: aeec65c5f09051a7f486e217bb79b95e78d744f6b23e48a9e7f96893faa12811
font_01_sfnt_off00007006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 14820 bytes
SHA-256: 3cce0e340bb1b67284678496ac96ab86d7af01b1c989d774462784bfcf5a27cf