Malicious PDF — malware analysis report

Static analysis result for SHA-256 6545f806f8b2fa1d…

MALICIOUS

PDF

40.5 KB Created: 2020-11-08 05:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7acc8df1e8869af5edc4d608ef3373da SHA-1: 1c3c7bf25ec936eceb907096a8146bb6dbcbea3c SHA-256: 6545f806f8b2fa1db3cf3b17bbdea49ae4713d6e34137646223b6fd847f968d0
66 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged as a link farm on disposable hosting, suggesting a malicious intent to redirect users. The ML classifier strongly indicates maliciousness. The document body contains a URL that appears to be the primary lure.

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://traffine.ru/123?keyword=long+nets+of+white+cloud+my+memory PDF link annotation
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/kifevi_miparotikopu.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/a85eca3228e8.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/vedexajawo/rock_drake_ark_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/watch_monsters_inc_online_free_putlockers.pdfIn PDF document text
    • https://jutewijil.files.wordpress.com/2020/11/43896907040.pdfIn PDF document text
    • https://zewabugajumo.files.wordpress.com/2020/11/87881813145.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/explosive_ammo_rust.pdfIn PDF document text
    • https://xavexijalise.files.wordpress.com/2020/11/nubidov.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/does_keurig_k_compact_use_filters.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/webanebomororokugoroti.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://xasuxedizos.files.wordpress.com/2020/11/manual_biomagnetismo_medico.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_off00005eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EED 5360 bytes
SHA-256: d427b25246726f82010e5d41e6797c4a6bce0c20376c0a4c9163fef98a2b9b33
font_01_sfnt_off00007122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 10576 bytes
SHA-256: 8d17f2c0daa783ff38ec87ae1b02303f58821add4b41b6cbbd8a5003946cf45d

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