Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1aab0941ab79ad2…

MALICIOUS

PDF

72.5 KB Created: 2021-02-13 17:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8dcb51d428da894453571c3a86f09d96 SHA-1: 762752fad953d7868180e48997f2c03b7960bd5d SHA-256: d1aab0941ab79ad21d60bdda7c6a6016cb051a6939128a5df047f551b9dc92ad
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://yafferge.ru/wix?keyword=legends+of+the+clans+pdf+free In PDF document text
    • https://cdn.sqhk.co/mujowofapubi/f8jgjat/bugsnax_ps4_amazon.pdfIn PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/3f1d1ff860.pdfIn PDF document text
    • https://fumirufax.weebly.com/uploads/1/3/1/8/131856188/1a5c155.pdfIn PDF document text
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/978085.pdfIn PDF document text
    • https://vezerovir.weebly.com/uploads/1/3/4/5/134580053/f3b1c78424e20a1.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/W2UNUfV/clash_royale_clan_wars_2_update.pdfIn PDF document text
    • https://fagojature.weebly.com/uploads/1/3/3/9/133987822/sijebuniwajadiji.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/exjiigg/15678229457.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/90022ae3.pdfIn PDF document text
    • https://pivazadigemeza.weebly.com/uploads/1/3/4/6/134642233/854338.pdfIn PDF document text
    • https://rutejiredoratel.weebly.com/uploads/1/3/1/3/131383841/8458025.pdfIn PDF document text
    • https://lijafaxad.weebly.com/uploads/1/3/5/9/135989690/6074132.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/fonibinaraj/pexoruvarudazarelepiluj.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/trichiasis_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/nawigalebuzufasibor.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/7193355985.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/burrus_and_matthews_line_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/molecular_compounds_worksheet_page_15.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/62524054940.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_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 5360 bytes
SHA-256: 5e0efa95e13faee6552c86e759936bad01fe6b82af3c9d2a272b328c4d7bd155
font_01_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10740 bytes
SHA-256: 1c4b54da339f2a739cc18ec8bc98e5ff2a6f40477bf11e6d045c3a4c34cdefc8

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