Malicious PDF — malware analysis report

Static analysis result for SHA-256 e047008d0957f181…

MALICIOUS

PDF

62.6 KB Created: 2020-11-07 09:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6cf9d99072d0e182d985dab6cc129250 SHA-1: 27b1f786637b447ded2e54fbd73a980eb1d66549 SHA-256: e047008d0957f1817e2e2394827cfe9ed36991411ec04c6c27360e02e8675e6a
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://ggtraff.ru/123?keyword=profit+and+loss+statement+for+home+daycare In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5f9c2a9e1e40c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f872179a44ca.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/tanikanaw/lausd_salary_table_after_strike.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/tesutexiwekekivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2615f81b-8319-483c-a380-c8dc93d08833/kexonerilosugaze.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/mavirux.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/carlsbad_current_argus.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/ipod_touch_64gb_3rd_generation.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/how_do_you_get_repo_contracts.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/bilogujoxi.pdfIn PDF document text
    • https://meniluw.files.wordpress.com/2020/11/voxezekipufejitopewuginov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4da9842-eefe-46a6-817f-802aba46c2bb/dakuxazenowosur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off0000b77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77A 5364 bytes
SHA-256: 30ceab27978205c1bdfdf1de117a84663791d13da8739ef481c9f406f5aeae6d
font_02_sfnt_off0000c999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC999 10480 bytes
SHA-256: b44a184f5bcd519fd0d45574eec1a0b896a82bb3ac068d656d2972a934fa8795

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