Malicious PDF — malware analysis report

Static analysis result for SHA-256 051b416cecdf43af…

MALICIOUS

PDF

64.2 KB Created: 2021-02-11 21:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 19207fe25f7aac8502a83f62401d5f2e SHA-1: 95d9b97f0a0ee74d9547aefb6f6eb77ab4275476 SHA-256: 051b416cecdf43af2412ac2d4027ffa88b08a51b39f4ef147555db32e5bbf836
196 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
  • 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://druttle.ru/wix?keyword=bloomfield+nm+school+salaries PDF link annotation
    • http://lobarularexe.iblogger.org/45191931076.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/79df7c284a4c.pdfIn PDF document text
    • http://uber-global.com/blue_book_car_value_guideopdoy.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/lunumebixiwizumolaseje.pdfIn PDF document text
    • http://damvglaz0.xyz/formation_pour_les_cadres_suprieurs_de_santac4dn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425515/normal_5ff35388f139d.pdfIn PDF document text
    • http://reduslimitalia-official.website/lidewibejonaboranutex6svxz.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/bidivo/tigotopon.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/younow_apk_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/51108832044.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/46999831211.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/turnitin_uk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/polyester_sheets_bedspread.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/92101139026.pdfIn PDF document text
    • http://wedizakur.epizy.com/already_just_yet_worksheet.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_off0000bec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC2 5308 bytes
SHA-256: 0ea0127181fd0a4e2ad5965619b10094f615fcde97f2ff874df3ffd4d4927114
font_01_sfnt_off0000d0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A8 10436 bytes
SHA-256: c254552e978f2b83d9d1ec940ce07b22e9b6e4bd89fd910e7eb4425e74589ac6