Malicious PDF — malware analysis report

Static analysis result for SHA-256 5569e96cd2c1b566…

MALICIOUS

PDF

45.2 KB Created: 2020-11-03 10:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e6893adb18900883de99a04dbe189f99 SHA-1: 5d723933aedccad93fa234f50e2b483bc9615575 SHA-256: 5569e96cd2c1b56630a677f44e9b21dfa82bc9ce6419c2b25920449d5c3084a0
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.cc/123?keyword=canada+citizenship+study+guide+2018 In PDF document text
    • https://zipalusub.weebly.com/uploads/1/3/4/3/134343211/17af630b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f9f90c2423eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_5f97ec583015d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8716695403f.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/larulepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8721cc3c8af.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/figugipopar/xodakopugekalulisoxamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ca9163-3aec-4c06-8759-b8cbb937415c/bass_pro_shops_xps_charger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf044bb-9a5f-4ad5-8b54-98634b972248/pijibopubekokifiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc93faf-06fe-43e6-80ad-19b0c576a41c/44085148054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812be867-df3c-4f60-834e-ad9605abf5f5/rock_player_apk_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_off00006ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA6 5784 bytes
SHA-256: a84c4fd2f42ab645bc1f61e68232c7020c3e94233925d6d5c44f035df56c78a8
font_01_sfnt_off0000826a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826A 11248 bytes
SHA-256: 7d5052a427d0020a6dea24408d1448e29a73243d0b0a25b4637788a434bb523b