Malicious PDF — malware analysis report

Static analysis result for SHA-256 0196febf2d649e96…

MALICIOUS

PDF

54.5 KB Created: 2020-10-31 03:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e03f2e7ad5217fd5036ddccf629f8e0b SHA-1: b155afa7e25701f1d5c8305064424a05af4e05a1 SHA-256: 0196febf2d649e96615c042b32559d17e9e0a43533e3e5a464e3e69532789823
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/aws?keyword=king+of+tone+vs+timmy In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f872b064dcff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420587/normal_5f96ffe51e880.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/3517059.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/775539d2eb126.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000095c2.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000095c2.bin)
    • https://s3.amazonaws.com/remuv/gepogixiworawajikerewuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/xexixef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/93239909597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431236da-1ab1-4c1a-af3c-614f87340fcc/xuposezusevupedadawesebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5057/3719/files/add_blank_page_to_foxit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0302/5840/files/whatsapp_apk_for_amazon_fire_tablet.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 extracted file (font_00_sfnt_off000095c2.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C2 4880 bytes
SHA-256: 73a6b19b1e4cfe8e71214c10dbc0f374b01d687040b3014a661125c7c4c5e578
font_01_sfnt_off0000a672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA672 11396 bytes
SHA-256: 903e9b17926b02c8d8ee195c6b7adbf196e9c61dc5ab6cac476c77a1083faa5f