Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e367d311c4573f…

MALICIOUS

PDF

53.6 KB Created: 2020-11-07 20:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 6f28ada7cfc3388077bfba99f532f827 SHA-1: 7b20b4284497682192c389edfb00af82a47b8509 SHA-256: 98e367d311c4573f9282a10b65d83c44436fb1bfeb55b548446e0dc3f4258460
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/123?keyword=the+satanic+witch+pdf PDF link annotation
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/nenabiwegit.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/laderote.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/a4ad693c-fb8e-43b8-957b-d0e607ead898/nevumawabejudepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2113a0c9-c9a5-4ce8-996d-95ed715623e4/60857242035.pdfIn PDF document text
    • https://mumuloluzug.files.wordpress.com/2020/11/cyberpunk_2020_rulebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2306be-b4c0-4ddb-b822-ad2c51023160/29633994220.pdfIn PDF document text
    • https://zijerugim.files.wordpress.com/2020/11/rizevef.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://ronesifipule.files.wordpress.com/2020/11/diabolik_lovers_game_english_online.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/10109043321.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/71053969233.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/arriba_spanish_textbook_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/cord_of_three_strands_ceremony_script.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/sister_wives_divorce_update.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_off000092cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CC 5156 bytes
SHA-256: db4520f29f59372410f07bed213bf027a88a9629afc828f76ca1c94691ece167
font_01_sfnt_off0000a46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46D 12024 bytes
SHA-256: 135d25a6980a75b03f14736e62a47e192a5ddd044976193a2a599a1b1bdc3a84