Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28ec3c76b7a5bfb…

MALICIOUS

PDF

73.7 KB Created: 2021-03-02 12:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 383b4572045ca4e0cbba3ce0cb342990 SHA-1: 10a408d21adade6ffaf5fa9a24fce0aadb4da99b SHA-256: b28ec3c76b7a5bfbd07385967778839f9c900ca689d506295b4c13e1c3b0bcf6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=rar+password+remover+online PDF link annotation
    • http://fotubobuwenapu.scienceontheweb.net/55354034464.pdfIn PDF document text
    • https://zeleveruki.weebly.com/uploads/1/3/4/8/134898901/2537525.pdfIn PDF document text
    • http://clientesdkb.com/34473005312m1sta.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/how_do_i_know_my_vocabulary_size.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/dewalt_dw402_parts_breakdown.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/63421671358.pdfIn PDF document text
    • https://kasadinup.weebly.com/uploads/1/3/4/6/134641165/xulufisune.pdfIn PDF document text
    • https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/goluzetunafu_wusaji.pdfIn PDF document text
    • http://healthyforczechrepublic.site/porter_cable_air_compressor_135_psi_6_gallon_2_hpfye7t.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/what_is_audacity_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaziwovapotulit.epizy.com/guxowokisosaz.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/88418781423.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/escape_room_level_38_answer_mystery_word.pdfIn PDF document text
    • http://dudulexo.epizy.com/61408974685.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/watch_over_synonym_formal.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/reading_surah_yaseen_full_image.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/beckett_sf_sm_oil_burner_manual.pdfIn PDF document text
    • http://mugevewobota.rf.gd/inverse_kinematics_questions_and_answers.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_off0000e373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE373 5264 bytes
SHA-256: 6cbde543fc6d456009175289ed3a2efec0bfd24a79ccad7000790d05c33311e1
font_01_sfnt_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 10704 bytes
SHA-256: 6779a7f378beb48bdf61415215045d8f9615426be0c883ff489efae12d54664d