Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef1a12339717e2c…

MALICIOUS

PDF

58.3 KB Created: 2020-11-02 17:34:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 53367983a5194cce0a07c6d80aef91b1 SHA-1: 10c02a92e896220c4ef8108f44df0024103dc904 SHA-256: fef1a12339717e2c50e6adf70406429b17f6724284e292b8f4b5d74dac03b102
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://gettraff.ru/strik?keyword=eureka+magicite+locations In PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/jitijulorexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444110/normal_5f9f1f2f966f1.pdfIn PDF document text
    • https://sigakoge.weebly.com/uploads/1/3/4/4/134437147/1967681a29c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f8706a9ef96a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f896b0210f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f8b96ec8b59e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5f8fa11219767.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/vopapubiwetavata.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/1/0496/0799/9654/files/bluebeards_castle_in_jane_eyre.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/fovozelumusidewozaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/world_history_before_1500_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1006/4036/files/compression_i_love.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/toxixeletabefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/the_pink_slip_meaning.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B4 5140 bytes
SHA-256: 51157d3fdc4e1b0cdb06c38f3337437f200abccb92cc0db2ea44f351f8b45880
font_01_sfnt_off0000b822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB822 10688 bytes
SHA-256: 49eaeac4e0b77edfa96f78f59702c50a408b49e4bda8659b7b578d8d684d3e71

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