Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f14edb2f8079539…

MALICIOUS

PDF

41.4 KB Created: 2020-11-07 20:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 91b061ebc5b10e6d2858f120af3bc303 SHA-1: d7aa7649dcaf7bd2f5b060652088195d76755657 SHA-256: 6f14edb2f80795394f2e8c86d64e882cda06228e11b22779198378140b1b53c7
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://trafftec.ru/123?keyword=exterminators+near+me+pdx PDF link annotation
    • https://lodejudimawepum.weebly.com/uploads/1/3/4/3/134350935/wizes.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/luzutivovok.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/1254517.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2570998.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/xojotupexo_venoxixipup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ririvolo.files.wordpress.com/2020/11/weduvudigi.pdfIn PDF document text
    • https://fupajore.files.wordpress.com/2020/11/92889661065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237ff464-db83-4282-868e-b79b509f8b70/gogaridetok.pdfIn PDF document text
    • https://gebirev.files.wordpress.com/2020/11/1023677649.pdfIn PDF document text
    • https://vuresorebe.files.wordpress.com/2020/11/bemuv.pdfIn PDF document text
    • https://nudiverid.files.wordpress.com/2020/11/72222428130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40493945-520d-4186-a72e-35e96f3bb6ad/ribewuwebabarefekekuzira.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_off0000649a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 5096 bytes
SHA-256: 001f544d6a16768740b14618de8635524499115e920e7b467e63c5d0c44c0fa2
font_01_sfnt_off000075d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 10408 bytes
SHA-256: 848610831d4f11a30706e11efb5a0cd3ab42f82e4babe29ae9e8f34fb9c207ba

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