Malicious PDF — malware analysis report

Static analysis result for SHA-256 900ee878e2c61a98…

MALICIOUS

PDF

73.2 KB Created: 2020-11-28 20:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d747559daf0a620940dddd98d8da2034 SHA-1: 40a0f7a76ca8645645a0298812d3bfaf826717d8 SHA-256: 900ee878e2c61a9874fa768c541f800cfc582784eb151262c83eebacbd2695a2
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=abbey+road+tg+mastering+chain+pdf In PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/ddf8a70db761ffa.pdfIn PDF document text
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/8f1e53e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7c6e6f4f-ed43-48eb-a886-4773e1d9dd86/13164167456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477192bc-1c43-48db-9a0b-f52f4ca0f353/remy_katy_evans_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bed2922-57b3-4779-9a8e-1a0db67acca7/durikigidosedokilaxaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23768ebe-8311-46f6-bd58-f8fc343735e9/house_of_doors_alexandria_va.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/adobe_flash_player_10._02_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd2ea53-40a3-4a52-b856-4ad99dc8b124/6345170186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/488d8717-50a6-402d-bebe-5c19ed304f41/modern_age_mod_victoria_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aad9532-3030-4607-ba64-a4a9ab0dbbd9/gomavudezajojowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58db1a89-61c0-469f-aade-36d64059e774/clarice_lispector_livros_melhores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634908b6-4419-46d8-afe8-ac22055a888a/sbcglobal.net_email_settings_outlook_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fb1819-a9c2-49c4-aee6-f7490a3e51af/51239906765.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 5556 bytes
SHA-256: cf7b4ff457b8c1bdcddf829c368c9b6d71acbfd6ef9008a659ae2efea650f90e
font_01_sfnt_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 10804 bytes
SHA-256: d1069a772bdbb3d183cbd523068511f76fad72a08543b606ff67e14052b9f263
font_02_sfnt_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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