Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b034d2e83283380…

MALICIOUS

PDF

66.7 KB Created: 2021-03-04 03:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3de223614cbe99fd7c49733dfbb2910f SHA-1: 37b0ef00bce563d683da2a74ae4a88f628f503a2 SHA-256: 8b034d2e83283380ecd16119288a3c38d615f95b744083ab9195748006f939ee
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/award?keyword=digidesign+003+rack+software In PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/93c804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_6009b0babb256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_6022670eee07b.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/47230824826.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495975/normal_5ffc66a0a7378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_60115e570e4bd.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/minelebuxolurukowonagato.pdfIn PDF document text
    • https://vujipobunovopo.weebly.com/uploads/1/3/5/3/135324227/875deaa59361.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/wowolatowavibek.pdfIn PDF document text
    • https://fileduwefevara.weebly.com/uploads/1/3/4/3/134384607/553474.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/ddc5ebe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/jozulaguxixemo.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/97211007087.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/august_telugu_calendar_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/sports_vocabulary_exercises_intermediate.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/emerson_nature.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/scatter_plot_graph_maker.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/can_you_reverse_engineer_an_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/lajejijid.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_off0000c8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D4 5616 bytes
SHA-256: b538c36d94d3d892d9568726023f86926647245d79738c82ba3206d75aee8976
font_01_sfnt_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 9804 bytes
SHA-256: 21764732ba17478260307b0ec22ce592314fea8d8ee4c4e69bcda2ffc0830ab3