Malicious PDF — malware analysis report

Static analysis result for SHA-256 6288879393c68858…

MALICIOUS

PDF

38.8 KB Created: 2020-10-06 19:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2a42507c2907d136686c67f623d9b60f SHA-1: bdd1a4bce60485bb4c55cd79cc870401a9b97a93 SHA-256: 6288879393c6885817c871f4e3e2e6bed98ca99bba0cea1b30452da8d1330dfc
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://ggtraff.ru/strik?keyword=ue+boom+wonderboom+manual In PDF document text
    • http://nabum.l-q-international.com/uploads/1/3/1/3/131380349/7141421.pdfIn PDF document text
    • http://files.jazzbluesanddiamonds.com/uploads/1/3/0/8/130814121/ledojod.pdfIn PDF document text
    • http://nulobapu.theroadrises.com/uploads/1/3/1/4/131483036/sapinubaper.pdfIn PDF document text
    • http://files.nextllcenter.com/uploads/1/3/0/8/130813827/e3bafd424d1dec.pdfIn PDF document text
    • http://files.firstflixreviews.com/uploads/1/3/2/6/132695892/serobom.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/7a180509-fcd1-4ed2-a11b-917bb167a95e/95631472358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b790e40-4a99-463a-acfb-1f99d90f01c8/gadometavomojured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0006b468-2123-4aa5-aa6d-c0f88c2b8fc3/naputafabekatul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6153/8727/files/94638995226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/pemulagitomufaxub.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCB 5016 bytes
SHA-256: ca62d0dac0bfc1daeb2609660843547085aef32e6d7c1e33ddb30a75285d35c1
font_01_sfnt_off00006ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 9904 bytes
SHA-256: f34e1487bb8ac724961406d41fca844b72e4f705bcb53be143a3b2e8938e735c