Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e157e10183a94f…

MALICIOUS

PDF

82.8 KB Created: 2021-02-26 05:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c2063a7a8c64232e5cfc5ddb29c7997f SHA-1: 111a594821d72984f3173897b27dd4d8e9a34549 SHA-256: 11e157e10183a94fc61a41dbc9107f113172122e1326e5021d0ba8d3d0c72f6e
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://bologen.ru/wix?keyword=walgreens+personal+humidifier+manual PDF link annotation
    • http://xufededubumavif.scienceontheweb.net/qu_alimentos_son_buenos_para_bajar_los_triglicridos.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/binomial_theorem_expansion_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_6010e16627958.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469630/normal_5ff391fe8417d.pdfIn PDF document text
    • https://jejonogukoji.weebly.com/uploads/1/3/4/8/134864124/7e29ee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5febfae7738d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_60308560ec7d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5ff95db40620f.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/nigefudifisin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388421/normal_5fe153dd66f03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulajadulixo.myartsonline.com/conjugar_verbos_en_ingles_en_pasado_continuo.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/fexifejugipiworumenurudow.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/rokutuwelavenavezoxiku.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/13617484924.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/aa_aashiqui_mein_teri_instrumental_ringtone.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_off0001075f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075F 5468 bytes
SHA-256: 207a434f8c533a15918cebde294a9b65f67add9a4f21c7fd558418cd66e29543
font_01_sfnt_off000119dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 10752 bytes
SHA-256: 04b2920b933a8070f468cc87e7b4e9ac9e3ac4e24ff4e02ad9b37282fdcd34d0