Malicious PDF — malware analysis report

Static analysis result for SHA-256 c304b575fe513668…

MALICIOUS

PDF

46.5 KB Created: 2020-10-30 13:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 89d121ac30ae91b56eb141ae8482ad8a SHA-1: d63778ef5997fe584d59e881f9aa63b3c3aa9ef5 SHA-256: c304b575fe513668c7b4e91c85ae53e7cfed130afa2793775e43603e7a81e587
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=dnd+5e+hand+axe+melee In PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/venabekar.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/2246694.pdfIn PDF document text
    • https://duvonejubuzal.weebly.com/uploads/1/3/4/3/134321315/9029585.pdfIn PDF document text
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/8522533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f95f3a0106d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f88830520c6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5f9b887375531.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/1/0501/0010/9507/files/don_bradman_cricket_17_android_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/horus_rising.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/candelario_obeso.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/83451403235.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_off00007588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7588 4980 bytes
SHA-256: 85f3c6fbbae1cd81ea9c74f2e96d559ec25cf84c35dd75920ddf6f5fea0536ac
font_01_sfnt_off0000865e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865E 11624 bytes
SHA-256: 3054b1b8f36f91320e6f7cae5daa79f0452e6375abc037f935b4a2639418d94d