Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc09fdcf1cda8d9…

MALICIOUS

PDF

71.2 KB Created: 2021-03-03 14:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cce9fb67e3d202f8a6e6e9a5d5b4b4cc SHA-1: 324bd04e1873b852eab50c85c5f8618013d158e4 SHA-256: bbc09fdcf1cda8d99ebeb2b2f3d7b1d2b48aba80bb95815710c7d48a5d856dd0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=what+are+the+four+structures+of+proteins PDF link annotation
    • https://demifezi.weebly.com/uploads/1/3/1/3/131379940/2826374.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/Hgg59id/door_slammers_1_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/igin5ws/moburavejedesusejunup.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/39414842087.pdfIn PDF document text
    • https://cdn.sqhk.co/megilujij/beighia/calculator_apps_download_for_mobile_jio.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/loxajupareviloreriki.pdfIn PDF document text
    • http://nutejujaxi.66ghz.com/brave_frontier_osiris_guide.pdfIn PDF document text
    • http://sidikapefujuxe.22web.org/balamefisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/moultrie_mcg-13034_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/79336712556.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/87278910656.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/vuledoruserefosuwejaxoboz.pdfIn PDF document text
    • http://wogulixa.epizy.com/94924988225.pdfIn PDF document text
    • http://vozuxekeve.rf.gd/bagebupawilixi.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/puwasu.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/61528088793.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_off0000dbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD3 5084 bytes
SHA-256: 2327c51624dc82d6685032317bc3c412b01dc710abf42835f2b41a47ab5be362
font_01_sfnt_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 10192 bytes
SHA-256: 3532859ff17ce1f092902f92629fe8b2fc50eebec8fa9034c0b16ba4b425b096