Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbaa3f0df57b359…

MALICIOUS

PDF

72.6 KB Created: 2021-03-01 10:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ed02d5d22e9722b3c9dd0c1736067337 SHA-1: b7458ceb67de398a28eac83d1a0ead385d6aafae SHA-256: 2fbaa3f0df57b359839caa686a5ca54c07af616afb56572bf9313d154675e632
254 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
  • 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://yafferge.ru/award?keyword=narnia+prince+caspian+song+list In PDF document text
    • http://sehq.xyz/69838069737xyq4m.pdfIn PDF document text
    • http://cheapestshop.xyz/luxefidulixsp32.pdfIn PDF document text
    • http://gatorama.site/red_storm_rising_board_game7stjx.pdfIn PDF document text
    • https://vipobonufemug.weebly.com/uploads/1/3/5/4/135401160/diwetawilanot-vazexen-nipajesoj-vapitofevax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456393/normal_5fdd2b14dbe06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_5fdc4d0433d8e.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/lodabozoxizuwula.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/xumimaletegujo-vojovuvaxaxov.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/texubitijux-xurexotafuja-giduxubejedas-lusun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454425/normal_5fc72d28dbac1.pdfIn PDF document text
    • http://justiciaforjustice.com/dazigupirivitugasebibifefznxw.pdfIn PDF document text
    • http://rcasino.info/morijajepusaxr9ktg.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/nedijowewoded/literary_analysis_paragraph_template.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/nejiz.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/xisasapedakosuvuxosirek.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/xafogesadimesuzuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/50291687878.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/57730914522.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_off0000d57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 5068 bytes
SHA-256: 533ed6a076bebf3617807c7729121d1de4a45114a2198fcf91cfe95d2f3532f8
font_01_sfnt_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 15052 bytes
SHA-256: b58a8792437658b7f91c893c3caa0a1028736b47c6133680e98f2262c57e6103

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