Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a7215b1932cf46…

MALICIOUS

PDF

70.9 KB Created: 2021-02-28 13:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d8ee03a69a6bb6bf80c551cdddd77459 SHA-1: 83f1f08f52284622b9b1225762e53e4c6db43075 SHA-256: e5a7215b1932cf46b35aaa9c617339c48105ee61cfe4d2661fcd9499e70c823a
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://dafemum.ru/award?keyword=how+many+calories+in+a+lemon+filled+krispy+kreme+donut In PDF document text
    • https://kunasituper.weebly.com/uploads/1/3/4/7/134765547/tirilifu.pdfIn PDF document text
    • https://lobodilogiji.weebly.com/uploads/1/3/1/3/131382226/lalaletiw.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/gghVYuk/counter_strike_online_2_size.pdfIn PDF document text
    • https://tudimase.weebly.com/uploads/1/3/5/9/135985307/mogatap_poveka.pdfIn PDF document text
    • https://banetopebored.weebly.com/uploads/1/3/4/8/134874573/majeroj.pdfIn PDF document text
    • https://nobixerevogug.weebly.com/uploads/1/3/4/4/134481004/mosoxu.pdfIn PDF document text
    • https://nijodumedogale.weebly.com/uploads/1/3/6/0/136082157/wivimogodawutop.pdfIn PDF document text
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/6f47809.pdfIn PDF document text
    • https://ridawijobufori.weebly.com/uploads/1/3/5/3/135318292/5955213.pdfIn PDF document text
    • https://rixexumig.weebly.com/uploads/1/3/2/6/132681576/migabimuzidowogabaw.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/hihHRie/prank_call_website_free.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/murudute/44639405263.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/jemakilokefir.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/adb_android_terminal_emulator.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/judipesokivu.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/bbm_full_form_of_school.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/34275008507.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/how_to_make_spreadsheet_read_only_2013.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_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 5520 bytes
SHA-256: a507c5719604dc18f797dcc1aef028c8af062250ef1d8fddcb0b1da73c17b11f
font_01_sfnt_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 9812 bytes
SHA-256: a59aa27eaead671c84a137bd9b75943b2438d3bc12783fc05c77c5a13e349e7d

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