Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c897ef766095e3a…

MALICIOUS

PDF

64.8 KB Created: 2021-01-12 17:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 04f0623b753e5e784d9de55f7e5eee06 SHA-1: b01cac178a2e2a28b238c9c63d63972cc92b6dd0 SHA-256: 3c897ef766095e3a2f5ecae7cd93461c7ad8756a684d4ee84f47b9873490a4c4
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://traffking.ru/wb?keyword=escape%20your%20limits%20jump%20rope In PDF document text
    • https://site-1172347.mozfiles.com/files/1172347/zedekazet.pdfIn PDF document text
    • https://site-1174959.mozfiles.com/files/1174959/recarga_saldo_claro_guatemala.pdfIn PDF document text
    • https://site-1192612.mozfiles.com/files/1192612/hard_boiled_eggs_easy_to_peel_salt.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/vapowuse-wuxozibamipisaj.pdfIn PDF document text
    • https://site-1173607.mozfiles.com/files/1173607/64482910792.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/duwogarafetefa_nofobanitum_jewebemuwipofi_nutemajem.pdfIn PDF document text
    • https://site-1177663.mozfiles.com/files/1177663/74535452107.pdfIn PDF document text
    • https://site-1176357.mozfiles.com/files/1176357/snapseed_editing_background.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/petikamov/pogobagotukejiwuludasise.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bicycle_suspension_design.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/99948718767.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/mosuginowibapa.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/mormon_boy_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/lupituzamakanuwepide.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/5668112243.pdfIn PDF document text
    • http://www.meijer.com/failover/In 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_off0000c0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BA 5212 bytes
SHA-256: 69213f12f6bb504c5f04dae8afc3802208d63ab3371fb8fe5f1b225d08f1113b
font_01_sfnt_off0000d271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD271 10560 bytes
SHA-256: 33d470f6b4bba19830426bd19516ed64aba7497fc7f86c29417c7a0d5b2d7db7

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