Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca0a248034e8bb1…

MALICIOUS

PDF

61.3 KB Created: 2020-10-06 14:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e540d4f6d0e34ba091a42d67f3777b77 SHA-1: 8ef740c8e9e78ce28e1ffb4fa44402be7bec3c30 SHA-256: 8ca0a248034e8bb129c1a961a534c446d681af2d3b72348d638496051f5dcc71
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/strik?keyword=manual+camara+canon+eos+600d+espa%25C3%25B1ol+pdf In PDF document text
    • http://dogesuz.tcsocalbaseball.com/uploads/1/3/0/7/130739256/venetofaluwunug.pdfIn PDF document text
    • http://files.funkychunks.com.au/uploads/1/3/1/4/131438353/wibuxesok.pdfIn PDF document text
    • http://files.healthytritowncoalition.org/uploads/1/3/1/3/131382274/lababoruvofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe5145f-9df1-4c8c-aa5b-d5eaab54f962/23647324886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a91143-205b-4f07-b9de-591264b81df0/41564290981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d75e690-2ed0-406b-abfe-e577afe2ef91/lizudigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e35bf2-b56f-4ac4-b036-46e53a286a62/71714424832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0cf71e0-a9e9-4dcc-8b0c-04e0a4c8f332/wuzebopanevevoxitiziluku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/netacad_ite_chapter_5_exam_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3509/3911/files/16450145547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/education_is_not_the_filling_of_a_pail_but_the_lighting_of_a_fire_plutarch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5461/files/minecraft_12.1_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2162/6267/files/angus_thongs_and_full_frontal_snogging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88872eb7-8854-4cc0-a2df-89038d694d51/41018861529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68b7560-914c-4d9d-9c20-20ef3af41d14/niwab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78deddb5-f299-49f8-9e26-7cb1b60418c1/pigedezul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE7 5816 bytes
SHA-256: a7d9f222855b02e08eab2ebeb72d465cf1a182b7c177a17d542cc447d1bf98c5
font_01_sfnt_off0000a063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA063 15592 bytes
SHA-256: e234b8b3824002794c4f9b85092f9244b43fa7defd9781a316bdab172f9ec6c1
font_02_sfnt_off0000cfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEC 16240 bytes
SHA-256: 840aca7af89d6665d446bd68a022ef871a8c4a07170005e3094ac854b8115bb7

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