Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb18eb91fb0dae6…

MALICIOUS

PDF

99.2 KB Created: 2021-02-24 06:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d087c3d836e02f63e1a9a361852590c5 SHA-1: 93eeaba9eca11a6f2dfb9bf37c7a135df099f8e6 SHA-256: 1cb18eb91fb0dae67e0bf659cba95404e0e9b666669c6ac8784ee42dfe25c4cf
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=evga+x58+sli+micro+manual In PDF document text
    • https://cdn.sqhk.co/riteximeras/dD7icij/1110386303.pdfIn PDF document text
    • https://dupifexuxesopap.weebly.com/uploads/1/3/5/3/135348138/1127474.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/Phcjc6P/taylor_swift_women_s_soccer.pdfIn PDF document text
    • https://xadijonoru.weebly.com/uploads/1/3/3/9/133997446/kewimonafasod.pdfIn PDF document text
    • http://zupebupinumupo.iblogger.org/82179762296.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/Kjiieig/random_facts_in_america.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/4420489.pdfIn PDF document text
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/8285991.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kilubediboxut.rf.gd/xirurolanexuj.pdfIn PDF document text
    • http://magikid.epizy.com/faxaradibusajemow.pdfIn PDF document text
    • http://fefemegazo.rf.gd/90572545859.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/folavogigadeli.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/fonakaladunosuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/54854426969.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/koletexisuladubedutovaxo.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_off000148f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F6 5520 bytes
SHA-256: a59f74c7026ddd66870027c513a4ce43ae51ddee1f7d6692aac3b6809a5fabc1
font_01_sfnt_off00015bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBA 11068 bytes
SHA-256: b01fc8ef05a9cdcd2705e8693e9b25c257a046bfb789627457a049e4e00737b7

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