Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c40e5379e96e799…

MALICIOUS

PDF

48.7 KB Created: 2020-10-25 08:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 02c24032e8ee4de93daffebfc244eadd SHA-1: 746dd4af452db119a18ff91f1fc0c391c94322ad SHA-256: 6c40e5379e96e799c47082dd5d23348a615fd56c9bd08b11a94ae5c6b32c3aa3
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://cctraff.ru/123?keyword=table+of+contents+worksheet+for+middle+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f885bb29c998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_5f94a6da91ea5.pdfIn PDF document text
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/doporiferujuguke.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/lonedelo.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://cdn.shopify.com/s/files/1/0501/7003/6412/files/birox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/evolution_of_operations_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/retineliwig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2084/7768/files/surah_falaq_english_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b908514d-34f3-4296-ab52-0f44d9d17476/50870462335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ac4007-1d5f-485c-ad32-4a308c0d6a1f/93068509915.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/14049149771.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/zakudimes.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/vogominiwulazofep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7580/7648/files/calculus_sigma_notation_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/82808397302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3005/1499/files/latest_imo_app_for_android_free_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5986 5296 bytes
SHA-256: edcf2b249dc223b711820349d23f9ab83787e908d004ba395b06fe45de751aa5
font_01_sfnt_off00006b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 9376 bytes
SHA-256: d9434f9bcc2a50671fd8351df2bf75179c557414012f2ddc1ece721a3d51e64b
font_02_sfnt_off00008bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC2 17800 bytes
SHA-256: b7c39d2c6156f420a022db913a2b56587c185c05d398cf15cd0d9c4c1d90b5cd
font_03_sfnt_off0000a651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA651 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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