Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c24c7b7096b5fb5…

MALICIOUS

PDF

71.9 KB Created: 2021-03-04 21:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5e4e0a3aa8fd324e7da35a45a40da1c7 SHA-1: c516c76d167edd6c8cb8581b87bc990f0b20f0c6 SHA-256: 5c24c7b7096b5fb5aa1135930311383210d1fcadc0a868be816be3d16a7bd0f9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/award?keyword=how+do+i+fix+the+sound+on+my+sony+bravia+tv PDF link annotation
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/rijopaginonesit_wujibe.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/8219687.pdfIn PDF document text
    • http://bitukab.iblogger.org/rogafamebesumasakaf.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/66275442296.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/xebibefadipawozozepa.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/solid_wood_school_desk.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/5682977.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/podeminasitelo.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/f8f6ae4316a8.pdfIn PDF document text
    • http://finomimetafix.sportsontheweb.net/web_shell_html_css_js_ide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kemogozamamov.epizy.com/wabopapuxikakasipimiru.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/zagoxogenewozabug.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/best_chinese_movies_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/fobujijatutovidelene.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/incline_bench_press_form_reddit.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_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 5540 bytes
SHA-256: 04bd72a1e46c7fa4f8b59b45cd311504eb29d05d9557bf64d74321d1d122c125
font_01_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 10444 bytes
SHA-256: 28fd4745b46605a5605e9b3144bd79dc388b966bcbda9b7dc7e2faa9d0fc5e56