Malicious PDF — malware analysis report

Static analysis result for SHA-256 7083086bf98a1c9a…

MALICIOUS

PDF

45.7 KB Created: 2020-11-07 01:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6ceb1bb47c97bdedab9a5e6f408561f1 SHA-1: ef4a74a3471f0bbf629587e8b341ed58da498dbb SHA-256: 7083086bf98a1c9a1e500c2833da22a5d73dafc5380a223e5de30474dffba265
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 4

  • 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/aws?keyword=glow+sticks+radioactive PDF link annotation
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/1b816d.pdfIn PDF document text
    • https://bazapefonufoteb.weebly.com/uploads/1/3/4/6/134637130/zewilusalo.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/galivolevuwubed_dozaxusuduxoraz_duvivedo.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/546312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://lamojofof.files.wordpress.com/2020/11/cursive_writing_file_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ratibu.pdfIn PDF document text
    • https://wupomasaxo.files.wordpress.com/2020/11/nifazejimow.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/song_ids_roblox_pop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248ea3e5-c6d9-4111-a8e5-02a255d57357/kitogezibusovisifuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/millennium_falcon_model_lighting_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/mawenafeduroximeziva.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_off000073ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BA 5180 bytes
SHA-256: 8725c87536b1293e8501c4b16b0d918e9f0421fcb75478516c6b762db82ef7e8
font_01_sfnt_off0000858b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858B 10748 bytes
SHA-256: 7bf1f614503ac9e78c199ce4ede4b72df74b9bc9886f76ab720a39bb46f89c95

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