Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf97556f217acde…

MALICIOUS

PDF

63.4 KB Created: 2020-10-30 22:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 025b5e92e077672b2a85dcbb0a0bd5b4 SHA-1: bfd4276ae36287d96dcbb528898c729e4d7471bf SHA-256: 1cf97556f217acdefdd34530a58bd94d96978fb3590d07563cd371deb2e4fe5f
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/aws?keyword=ddo+monk+build In PDF document text
    • https://ruwuragawani.weebly.com/uploads/1/3/4/3/134383911/xofosoduza.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/2840615.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/2026f68e-6536-4935-bddd-fdf4a6fe25d3/pajujana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/presente_simple_en_ingles_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6522/7432/files/dc_dimplex_storage_heater_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f69a761-d16c-4a6b-be9a-a3835ab4c023/68161104304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7133/9194/files/modifier_gratuit_inkscape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f1ef7da-8b33-46bb-8538-4e78e26a2b84/wazogefelate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29771ff7-96f4-48db-8386-7044197ed043/82651577616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/wasuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3659/6131/files/animation_maker_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3B 4688 bytes
SHA-256: c3eefeb3c3d10625640e4a64f1dfee8f7292ea6fc547d256e25102ffa719399d
font_01_sfnt_off0000ca20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA20 11004 bytes
SHA-256: 1a41f8ad55b2533c09bdd824a17bad01192ae9375ae4de2aab4b70a725b353dd