Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b6f04e614c22da…

MALICIOUS

PDF

43.2 KB Created: 2020-10-31 04:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: bbc4aa9c28c4f89001b2f9f775f5c84b SHA-1: 3679e58fd5524a3c1bf982266906b2daf7046afa SHA-256: b9b6f04e614c22dae79f54b768e2bc8c5dde1792120f5bfc027ee4e5ef53a0bf
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://ttraff.club/pify?keyword=fireboy+and+watergirl+2+unblocked+76 In PDF document text
    • https://kozezivu.weebly.com/uploads/1/3/4/4/134444222/pivejumomomubapurivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8c9ba96f193.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/donadej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xalasawu/jigumiwow.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/72864374249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0777/0263/files/guillermo_gomez_pena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0522/3327/files/figuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0180/4462/files/50635115205.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/93972815500.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/below_zero_ice_cream_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/96309452230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8724/8538/files/53666107904.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/aubergine_menu.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00005887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5887 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off0000696e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696E 5648 bytes
SHA-256: aa65645216929bfca12b62e25328088cb934903517940d39931bebd88435281e
font_02_sfnt_off00007ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE2 10180 bytes
SHA-256: afb8c48267b73f437eaf5868e3e59b67be4ecd4e8ddab1ff4745e2b4b6241421