Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb839447ba15f73…

MALICIOUS

PDF

59.8 KB Created: 2020-11-08 03:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8199a3f0c1746d85a7a99a67058452e1 SHA-1: dac51f2906321fa1831f9ea78aa0f0f0a958e31e SHA-256: eeb839447ba15f738505c86f05d4cb52f12706914531c56d705ba955e3379ef8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/aws?keyword=motels+near+haymarket+park+lincoln+ne PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8c29594b410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8741d371f6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5f8ed48e8740c.pdfIn PDF document text
    • https://numuluga.weebly.com/uploads/1/3/4/3/134307024/kivivifepamiwi_mamajod_makipofodazede_bogoganematata.pdfIn PDF document text
    • https://kageketiwef.weebly.com/uploads/1/3/4/5/134581137/a029624cac365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f8f8b9a7fe31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5f9c50c9625cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nazedumaduwoxap.pdfIn PDF document text
    • https://dadasumuw.files.wordpress.com/2020/11/kazaxurujorejabam.pdfIn PDF document text
    • https://bomobaral.files.wordpress.com/2020/11/zafijo.pdfIn PDF document text
    • https://fategokixeju.files.wordpress.com/2020/11/jojax.pdfIn PDF document text
    • https://zilexir.files.wordpress.com/2020/11/nepite.pdfIn PDF document text
    • https://sirilab.files.wordpress.com/2020/11/21530769035.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/frederick_municipal_forest_hunting.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_off0000a9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E2 5344 bytes
SHA-256: 805ea9d08108b538eae463355101e1070943107e4424ad105df43e10ba36b020
font_01_sfnt_off0000bbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF5 11444 bytes
SHA-256: 7f95a66a31ea97e8622299c84c0c55cecb668c8c26cfdf10becc7dbc7007a275

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