Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8b23bba5618a71…

MALICIOUS

PDF

34.5 KB Created: 2020-11-03 02:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 13e43bea296a5778d96c30bc15706c19 SHA-1: d9fce4d183f1c1718f1ed0b0269d807feb729eb2 SHA-256: 5c8b23bba5618a71c5b92b3a7c8f551fc49416dda9b022ae20b323a3ea23a603
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pokemon+tower+defense+hacked+3+legacy In PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/39779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f94afa37a275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_5f93570350baf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f8f854f720a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5f97e22e3a77e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/altice_one_channel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d4dc73-e5bb-49f0-a180-2de356bd559c/26326186058.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/sharecloud_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c4dbc1-dc6a-49d6-856d-2a355c7777cd/vonupub.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_off0000485e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x485E 5860 bytes
SHA-256: 06301cbbd639230a771607bad21d14d4b5ad5cb413f738e08d8009f3b2e09830
font_01_sfnt_off00005c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C44 9684 bytes
SHA-256: f26a70b202196b24291d4de89b6d6534b67c41fd4394e4a556c5e276ded25d72

Open this report in the interactive analyzer, or submit your own file for analysis.